Rhinoite® Weld Hardfacing Application Process

1. Material selection. Custom overlay for a wide range of wear applications. Base metal and weld wire selection based on application; carbon steel, stainless steel, duplex steel and Inconel.
2. Overlay. Generally a two-layer-automated GMAW process with tungsten carbide power dispersed in the first layer.
3. Finishing. May grind to desired dimension or leave as welded depending upon application.

• Rhinoite® provides bottom-line cost savings
• Minimizes loss of production time by wearing five to seven times longer in service operations than bare metal
• Reduces frequency of shutdown times to years rather than months
• Eliminates equipment rentals, insulation replacement and inspection frequency
• Reduces required man-hours for overall maintenance of units
• Improved safety by reducing the risk of equipment failure

• Elbows
• Pumps
• Valves
• Stabilizers
• Bearings
• T-sections
• Furnace bends
• Furnace caps
• Coker nozzles
• Choker tubes

Rhinoite® Product Brochure

Design Features

ValvTechnologies’ low pressure, trunnion-style, metal-seated ball valve incorporates many of the features of the traditional integral seat design into a lower-torque, bi-directional valve. The Nextech® R features a readily adjustable stem sealing design with a four-stud, live-loaded, industrial-grade packing gland assembly and offers diamond mate-lapped tungsten or HVOF RiTech™ coating on sealing surfaces. The Nextech® R is available in a variety of end connections to meet customer’s specifications.

1. 1. Live Loaded Gland Area. Nextech® R’s gland packing design features a four stud, live-loaded assembly designed for heavy industrial applications. The packing material is high purity Grafoil® surrounded by Carbon Fiber / Inconel anti-extrusion rings. The six Bellville springs (per stud) provide constant load pressure through extreme thermal shocks and prevent wear leaks in high cycle service.
   2. Carbide Sealing Surfaces. The sealing surfaces are overlaid with tungsten or chromium carbide using our exclusive HVOF RiTech™ process. These surfaces have a hardness of 68 – 72 Rc to allow long periods of operation in the most severe conditions.
   3. High Integrity Seat Surfaces. To prevent leaks around the seats, ValvTechnologies has developed an innovative double seal design for high temperature operation and/or high cycling applications. In low temperature, high cycling service, a secondary elastomer seal is installed on the seat perimeter
   4. Solids Resistance. In addition to the carbide coatings which will allow the valve to function in highly abrasive applications, the individual valve parts have additional seals to prevent interference from solids in the system. This provides for outstanding performance in catalyst systems, streams with solids contamination and polymers.

• Heavy-duty service assured with four-stud, live-loaded packing assembly
• Two-piece side-entry body offers proven weight and space savings
• Optimized 2 to 24″ sizing offers flexibility in operating regimes, locations
• Outstanding performance in catalyst systems, polymers and stream with solids contamination

NexTech® R Brochure

326_NexTech R cutsheet_Aug.2023

IsoTech®, ValvTechnologies’ PSG valve addresses the need for true in line valve repairability in large diameter, high energy piping systems. Specifically designed for steam and feedwater applications, IsoTech® provides bi-directional, zero-leakage using our exclusive HVOF RiTech® process.

1. Bonnet area. The pressure seal bonnet has been designed with a graphite composite seal. The bonnet has sufficient mechanical bolting to ensure the seal does not relax during periods when the system is not pressurized. In addition to the high reliability of the seal, the bonnet area has been designed to minimize the problems associated with maintenance on large gate valves. The valve has been designed so that the bonnet does not have to be forced in to the valve bonnet throat to allow for the segment rings to be removed. The large bolting used to ensure that the pressure seal is always loaded has also been utilized to enable simple dissassembly of the bonnet once the easy to extract segment rings have been removed.
2. Gland area. The gland is the same standard design employed throughout ValvTechnologies’ various valve product lines. The stem and gland are hardfaced and polished. The packing has 316 SS woven wire mesh anti-extrusion rings top and bottom and grafoil center ring. This is combined with our proven, superior, multiple Belleville® spring stacks, live loaded stuffing box. The gland design completes the superb proven pedigree of this valve range.
3. Disc and seat area. The valve discs and seats have been overlaid with the same carbide overlay (68-70 RC) as its counterpart, the ValvTechnologies’ metal seated ball valve. These seats are several magnitudes harder than Stellite 6, typically (34-38 RC) and are lapped to achieve a bubble-tight seal under all pressure conditions, including vacuum. The large spring load ensures a high initial seal, and the line pressure increases the sealing. The web guide (which is also carbide overlayed) ensures the discs are kept parallel, whether the valve is in the open or closed position. This overcomes a common gate valve problem. As the valve is cycled under differential pressure, the extremely hard surfaces continually hone and polish each other instead of scratching and galling. The seal is improved rather than degraded with wear/use.
4. Back seat area. The back seat is coated with chrome carbide (typical hardness 68-70 RC) and polished to achieve a bubble tight seal.

• Fully bi-directional isolation. Benefit: outstanding operating flexibility
• Long service life – sealing surfaces are overlaid with tungsten or chromium carbide cermets using our exclusive HVOF RiTech® process. Benefit: allows for exceptional resistance to attack by abrasives and fluids
• Stem, discs and guides overlaid with tungsten or chromium carbide cermets using our exclusive HVOF RiTech® process. Benefit: extra protection delivered
• The sealing surfaces are coated with chrome-carbide hardcoating to RC 72 hardness, then diamond lapped for a precision fit. Benefit: The exceptional hardness and temperature ratings to 1800°F make our valves extremely resistant to attach of abrasives and fluids, particularly steam and flashing water
• Designed for ease of maintenance. Benefit: The only requirement is for the disc to be flat against the seat. This is easily accomplished as there are no precise angles to maintain. Pressure seal bonnet has been designed to facilitate easy removal when necessary.
• Protected seats. Benefit: In the full open position, the flow through “conduit” is positioned precisely between the seats, eliminating turbulence and flow impingements on the seats. There is no gap between our conduit and the valve seat. Small gaps in our competitors’ valves cause extreme turbulence and in come cases cavitation.
• Self-cleaning. Benefit: Frequent valve usage polishes the surface for less torque and improved sealing. The high spring load insures contact throughout the stroke of the valve and prevents particulates migrating between the disc and seat also helps assist in the honing action.
• Various flow control options, including a v-port orifice. Benefit: This is ideal for warm-up and some bypass requirements
• Stem extensions. Benefit: Because of the low break-away and running torque, various stem extensions are available so that handwheels and actuators can be located remote from the valve
• Tight shutoff. Benefit: As a standard, ValvTechnologies meets zero-leakage requirements on low-pressure air and high-pressure water
• High spring load. Benefit: ValvTechnologies’ very high spring load not only assures contact between the gate and seat, but at all positions from open to close. This allows zero-leakage on hydrogen on vacuum.
• Parallel discs. Benefit: Unlike conventional designs where the discs are only parallel in the closed position, IsoTech® valves are designed to maintain its parallel discs from both the fully-open to the fully-closed position.
• Oversized stem diameter in comparison to other PSG designs along with or in combination with the tee-slot as opposed to a threaded and pinned hanger. Benefit: Increased reliability with this durable, robust design

Case Study: Parallel Slide Gate (PSG) – Proven Success in Single Isolation

Location: England
Plant type: Coal power station
Product: PSG – Parallel Slide Gate

Background: A UK plant situated near the town of Selby, England, is the largest, cleanest and most efficient coal burning power station in the United Kingdom. Its generating capacity is 3,960 megawatts and at current output levels generates enough electricity to meet the needs of seven percent of the United Kingdom. This plant, greatly concerned about the environment, focuses on a low-carbon economy, a concept that refers to an economy which has a minimal output of greenhouse gas emissions into the biosphere, but specifically refers to the greenhouse gas, carbon dioxide (CO2). Understanding their very important role in the transition towards a low-carbon economy, this plant is committed to reducing emissions and have various projects ongoing which will deliver significant savings.

Requirement: ValvTechnologies’ UK distributor, International Procurement Limited (IPL), specialized in the supply of critical and severe service valve isolation solutions. In 2004, IPL began supplying ValvTechnologies V1-1 metal seated severe service ball valves for problem areas such as drains and bypasses for the power station. Because of the longevity and reliability of the isolation provided on the drains and by-passes, the plant began to use the ValvTechnologies products in other applications in the power station.

During 2007 and 2008, IPL supplied a number of 12, 14, 18 and 20” diameter, PSG valves for units one-three on the feed system (replace with Feed Puml and Feedwater system).

Solution: The valves proved successful in providing single isolation, which allowed maintenance to be carried out on tube leaks without shutting down the entire system. IPL has since supplied 8” and 10” diameter PSG valves to Drax Power taking the total number of units to 36. The ValvTechnologies’ zero-leakage valve range is the premier solution where isolation is required for critical and severe service applications, providing increased safety and reliability, while reducing emissions, contributing to a cleaner environment.

Case Study: ValvTechnologies’ IsoTech® PSG Valve – Reducing Total Cost of Ownership

Product: IsoTech® parallel slide gate valve
Location: Ontario, Canada
Plant type: Two-on-one combined cycle power plant
Industry: Fossil power
Application: HP steam-main steam stop

Background: The plant had two main steam isolation parallel slide gate valves (PSG’s) installed in this application. Design pressure and temperature for the application is 2350 psig at 1050°F (162 bar at 566°C). They were experiencing severe leakage when valves were required to isolate. From initial plant start-up, the frequency of valve maintenance of up to twice per year per valve. The cost of $40,000 per repair, was a particular concern for the plant. These repairs were strictly limited to disassembly, cleaning and visual inspection, grinding the seats and discs and reassembly. Well before the plant anticipated they were faced with having to replace valve seat rings and discs. The plant management decided to look at their alternatives for an upcoming outage.

Requirement: The plant installed two 12” 2500# C12A ValvTechnologies’ IsoTech® parallel slide gate valves during their spring 2014 outage. The IsoTech® valve was the perfect remedy, as it utilizes a RiTech® chrome carbide hardcoating on the disc and seats, providing a more robust, stable sealing surface at elevated temperatures.The IsoTech® valve is a through-conduit, position-seated design, which protects the valve seats from the flow stream, resulting in a valve that provides zero-leakage and requires zero-maintenance. ValvTechnologies is so confident in its ability to withstand demands of steam isolation, that they back the valve with a four-year performance warranty.

Solution: The valves have been installed and in-service for over two years and have experienced over 270 cycles with zero maintenance required. The valve’s ability to provide zero-leakage has resulted in drastically reduced downtime, which combined with the maintenance cost savings, has presented a two-year return on investment (ROI) on the original purchase/installation cost.

Drax Power Station – Heat rate efficiency and lower emissions

Severe service isolation valve leakage significantly reduces a plant’s heat rate performance, because millions of BTU’s leak away through hundreds of valves, and never reach the turbine. With ValvTechnologies’ zero-leakage severe service isolation valves, less fuel is burned to produce megawatt’s, which leads to lower emissions ultimately lowering costs. Turbine isolation and the parallel slide gate valve.

Steam turbine damage by water induction is a costly economic, safety and major reliability concern. It is essential to have high quality reliable valves to isolate a turbine. ValvTechnologies’ IsoTech^® parallel slide gate valve (PSG) addresses the need for true in-line repairability in large diameter, high-energy piping systems specifically designed for steam and feedwater applications.

Various bypass configurations

• Main steam isolation
• Cold reheat isolation
• LP heater isolation
• HP heater isolation
• Feedwater isolation

Delamination Guarantee + Four-Year Zero-Leakage Warranty

BACKGROUND: Delamination is the separation of the Alloy 6 or 21 hardfacing from the substrate and is believed to be caused by a sigma phase formation typically found when applied to F91 or C12A materials. This results in catastrophic destruction of the seat seal allowing the migration/liberation of the hardfacing, jeopardizing downstream components. The industry first learned of Alloy 6 delamination in a large valve designed for high-pressure/high-temperature steam service at the 2009 7F Users Group conference. 7F Users Group, Inc. is organized to provide an open forum through conferences and technological aids to the owners/operators of the GE 7F combustion turbine generator systems for effective communication, discussion and information dissemination regarding the operation, maintenance, inspection, troubleshooting and repair of such systems to maximize equipment performance and reliability

An alert concerning Alloy 6 liberation came from GE Energy, which issued Technical Information Letter 1626 on January 30, 2009. It advised steam-turbine owners to check the condition of the Alloy 6 inlay sections used in fabricating seats for the OEM’s combined stop and control valves. Guidelines and Specifications for High-Reliability Fossil Power Plants, 2nd Edition “Best Practice Guideline for Manufacturing and Construction of Grade 91 Steel Components”, was introduced in June 2015 by The Electric Power Research Institute (EPRI).

SOLUTION: ValvTechnologies’ IsoTech® parallel slide gate valves are built specifically for modern-day severe service power applications where temperatures exceed 1000˚F (538˚C). Our RiTech® 31 hardcoating technology is impervious to the effects of high temperature cycling typically seen in combined cycle power plants in main steam isolation and hot reheat applications. ValvTechnologies guarantees that our IsoTech® parallel slide gate valve, provided with our recommended RiTech® 31 hardcoating for use in high-pressure and temperature, super-critical and ultra-super critical applications, will not delaminate for 10 years or 10,000 cycles – whichever comes first.

REMEDY:In the unlikely event the RiTech® 31 hardcoating delaminates from the substrate as described above, ValvTechnologies will provide the necessary labor, supervision and tooling to replace the defective components limited to the discs (2) and seat rings (2), either in situ or in a controlled shop environment. This guarantee is in addition to our standard Four Year, Zero-Leakage warranty. ValvTechnologies makes no warranty of any kind whatsoever, expressed or implied, other than as specifically stated herein.

Standard four-year, zero-leakage warranty in steam and water applications available in addition to the ValvTechnologies’ Delamination Guarantee.

IsoTech Product Brochure

1. Integral metal seat. With our proprietary HVOF RiTech® coating technology, the integral seat in ValvTechnologies’ valves is resistant to the attack of abrasive magnetite and ferrous oxides that may be seen in the steam flow.
2. Body seal ring. ValvTechnologies employs a field proven seal ring technology to ensure sealing under all operating conditions, up to 1400°F. The body seal ring is loaded at a pressure higher than 20,000 psi. In addition, valves sized three inch and above contain a secondary Grafoil seal to further guarantee reliability
3. Patented coating process. The sealing surfaces are overlaid with tungsten or chromium carbide using our exclusive HVOF RiTech® process. These surfaces have a hardness of 68 – 72 Rc to allow long periods of operation in the most severe conditions.
4. Live-loaded gland area. The V Series’ sealing design features a four stud, live-loaded assembly designed for heavy industrial applications. The sealing material is high purity Grafoil® surrounded by stainless steel wire mesh anti-extrusion rings. The six Belleville® springs (per stud) provide constant load pressure through extreme thermal shocks and prevent wear leaks in high-cycle service.
5. Blow-out proof stem design utilizes a one piece, hard-faced, blow-out proof stem that is inserted through the inside of the body cavity eliminating the possibility of blow-out through the gland area.
6. Backpressure protected sealing. Standard with the V1-1 valves, the design prevents the upstream spring from collapsing in a reverse flow condition, protecting the internals from damage and guaranteeing shutoff in the reverse direction.
7. Zero-leakage shutoff. ValvTechnologies tests every valve according to ANSI procedures, however, we toughen the standard and define zero-leakage as no detectable leakage of gas or a liquid for a period of three minutes or greater. The ValvTechnologies’ standard is zero drops and zero bubbles, guaranteed.

• Through conduit design: No tortuous flow path. When open it has the highest possible Cv’s. Minimized wear & tear. Benefit: Eliminated vibration, reduced maintenance
• Fixed position – quarter turn: No seating torques required. Benefit: Minimized stem wear, lower cost of ownership
• Hardened blowout proof stem: One piece, inserted through the body & shouldered. Eliminates the weak link of collared & pinned designs. Benefit: Improved safety
• Metallic body seal ring: Increases body integrity by eliminating external leakage. Benefit: Improved reliability, zero-leakage shutoff
• Live-loaded packing gland: Minimum four bolt configuration with shallow stuffing box. Ensures consistent torque at variable pressures & temperatures. Benefit: Increased reliability
• Hardcoated & mate lapped seats: High Velocity Oxygen Fuel (HVOF) RiTech® chrome carbide hardcoating with a Rockwell C of up to 72. Mate-lapped seats. Benefit: Wear & corrosion resistant, increased reliability, zero-leakage shutoff
• Seat designs: Hardcoated, both ball & integral downstream seat to the end-cap to eliminate a potential leak path. Benefit: Increased reliability
• Simplicity of design: Designed for ease of installation & maintenance. Benefit: Easily actuated, increased system reliability, increased efficiencies, ease of use, reduced maintenance
• Stringent testing: Every valve is tested, documented & serialized. Benefit: Increased reliability, increased safety, total traceability
• Four-year warranty*: The very best in the industry. Includes internal seat leakage & external leakage through the packing &/or body seal. Benefit: Lower cost of ownership, increased reliability

*steam and water applications

• Insulating jackets: For further protection valves can be fitted with removable and reusable valve insulation blanket jackets
• Mounting hardware: ValvTechnologies’ external stop mounting hardware minimizes or eliminates stem and sealing performance problems caused by a faulty re-installation of an operator on an automated valve
• Other options:
  • Bi-directional shutoff
  • Special end connections available
  • Class V sealing in the reverse direction
  • Tandem arrangements
  • Complete automation packages available
  • Characterized trim
  • Oval hand wheel
  • Actuator mounting

Specialty industries: Other industry solutions available. Contact the factory for more information.

Standard ValvTechnologies’ four-year zero leakage warranty in steam and water applications.

300_V1-1 data sheet_Aug.2023_V2

• Yoke Selection– available with symmetric or canted yokes.
• Corrosion Resistant –  three stages of internal and external coatings plus PTFE inner cylinder surface.
• Modular Design– available field-serviceable drive, power, spring and override modules.

• Travel Adjustment – Bi-Directional travel stops allow 80° to 100° adjustment. preventing ingress of foreign object or water.
• Replaceable Bearings – Replaceable bearings protect sliding and rotating parts in dry and lubricated conditions.
• High Efficiency – The piston rod and guide block connection, superior surface finishes and self-lubricating bearings maximize input energy .

• Seat supported ball valve with an integral downstream seat – extended wear life
• Traditional failure modes (slurry wear from passing and coating failure) eliminated
• Rhinoite® weld-applied carbide hard facing leads the industry for wear resistance – extended wear life
• Integral seat eliminates the traditional gap between the seat ring and the body pocket, which is a leak path
• Integral seat cannot move and will keep a continuous wiping action to maintain the sealing surfaces clean at all differential pressures
• The Rhinoite® process includes sealant which aids lapping/sealing and minimizes torque requirement

• Improved performance and reliability 
• Increased operational uptime, production runs and end-user revenue
• Seat supported ball valve with an integral downstream seat – extended wear life
• Rhinoite weld-applied carbide hard facing leads the industry for wear resistance – extended wear life
• No gap between seat ring and body pocket – leakage path eliminated 
• traditional failure modes (slurry wear from passing and coating failure) eliminated
• Integral seat cannot move and will keep a continuous wiping action – sealing surfaces clean at all differential pressures
• Rhinoite sealant – minimizes torque requirement of hard facing overlay

Case Study: Outperforming the competition

Location: Russia
Product: Autoclave discharge block valve
Industry: Mining and minerals
Product: 1 Qty, 1/2” ANSI Class 300 AbrasoBlock® valve

Challenge: To achieve 500 cycles and 50 hours operation without failure of the valve, during an accelerated product trial

Solution: The valve test will take place during the test/elaboration of the autoclave POx- technology of the gold bearing sulphide concentrate into the pilot autoclave line. The purpose of the pilot plant is to test different coating technologies to find a solution for the inherent problems in other valve designs and coating technology during this difficult process.

The AbrasoBlock® integral seat design valve was installed in the pilot plant and trial commenced.

Result: The trial was completed with excellent results. The valve successfully achieved 75.5 hours and 970 strokes of operation. This by far outperforms all other manufacturers’ autoclave block valves trials. The end-user will proceed into commercial supply agreement for valves to be installed in their industrial autoclaves.

Automation packages
Actuator mounting
Bi-directional sealing
Process-specific options
Engineered-to-order: Consult the factory for more information and additional options

High Pressure Acid Leach – HPAL – Target Valve Applications

Pressure Oxidization– POx – Target Valve Applications

HPAL
Acid feed isolation
Acid line drain
Discharge isolation
Discharge line drain
Flash vessel drain
Heater feed isolation
Heater pressure control
HP air isolation
HP heater isolation
HP heater vessel drain
Rapid depressurization
Slurry feed pump discharge drain
Slurry feed pump isolation
Slurry feed pump suction drain
Slurry pump suction isolation
Steam isolation
Steam supply control
Steam supply drain
Vent isolation
Vent isolation drain

POx
Discharge isolation
Discharge line drain
Feed dilution drain
Feed tank flush system
Feed tank pump drain
Flash vessel drain
Oxygen isolation
Pre-heater drain
Quench isolation
Rapid depressurization
Slurry feed pump drain
Slurry feed pump isolation
Slurry feed pump suction drain
Sparge drain vent
Steam isolation
Steam supply control
Steam supply drain
Vent isolation
Vent isolation drain

AbrasoBlock® Product Brochure

1. Live-loaded gland area. The NexTech®  design features a four stud, live-loaded assembly designed for heavy industrial applications. The sealing material is high purity Grafoil® surrounded by stainless steel wire mesh anti-extrusion rings.
2. Carbide sealing surfaces. The sealing surfaces are overlaid with tungsten or chromium carbide using our exclusive HVOF RiTech® process. These surfaces have a hardness of 68 – 72 Rc to allow long periods of operation in the most severe conditions.
3. High integrity seat surfaces. To prevent leaks around the seats, ValvTechnologies has developed an innovative double seal design for high temperature operation and/or high cycling applications. In low temperature, high cycling service, a secondary elastomer seal is installed on the seat perimeter
4. Solids resistance. In addition to the carbide coatings which will allow the valve to function in highly abrasive applications, the individual valve parts have additional seals to prevent interference from solids in the system. This provides for outstanding performance in catalyst systems, streams with solids contamination and polymers.

• Guaranteed tight shut-off. Benefit: Enhanced process safety and repeatable sealing allows operation under process excursions
• True metal-to-metal sealing without using secondary elastomeric seals. Benefit: Inherent fire safety
• Solid-proofed by design. Benefit: Process reliability
• HVOF RiTech® coating technology. Benefit: Extended life
• Grafoil® seals. Benefit: Reduced maintenance costs
• Double block-and-bleed capability. Benefit: Enhanced process safety
• High-cycling capability. Benefit: Process reliability
• Bi-directional sealing by design. Benefit: Enhanced process safety, lower maintenance, less downtime
• Single-piece anti blow-out stem design. Benefit: Enhanced process safety
• Impervious to high thermal cycling. Benefit: Enhanced process safety
• Certified to use in SIL 3 loop. Benefit: Enhanced process safety
• Live-load stem packing (four-bolt design). Benefit: Lower emissions
• Stem fugitive emissions per ISO 15848-1 Class B. Benefit: Lower emissions, enhanced process safety
• Fire safe certification: API-607. Benefit: Enhanced process safety

Case Study: Teamwork Builds Success

Location: Southeast United States
Plant type: Combined Cycle Power Plant
Industry: Power
Application: HP Steam

Background: During a scheduled weekend outage, a large combine cycle power plant discovered a valve that would not move. Upon further inspection, the customer found a damaged coupler on the valve’s mounting bracket. Assuming this damaged coupler was causing the valve to lock up, the customer decided against purchasing a new valve and instead simply replaced the damaged mounting bracket. Preparing to go back online, the customer found the valve would still not function.

Requirement: Immediate shipment of a V Series metal seated ball valve for main steam draining was required to avoid extended outage time.

Result: Receiving the emergency request on Saturday, ValvTechnologies quickly assembled a cross-functional team to provide the power plant with an immediate solution. Representatives from the Shipping, Warehouse and Service departments were called to the Houston office to solve the customer’s issue. The ValvTechnologies’ team was able to identify, assemble, test and ship a replacement zero-leakage valve by the end of day Saturday, the very same day the emergency request was received.

The customer received the valve Monday morning and immediately installed it. The new valve functioned perfectly and the customer was able to go back online, saving thousands of dollars in potential down time and revenue loss.

• Refining: Continuous catalyst regeneration (CCR) reforming (UOP and Axens), pressure swing adsorption (PSA) skids, cumene production, low-pressure catalyst handling in hydrotreaters and hydrocrackers, gas drier (molecular sieve) applications, hydrogen or oxygen service
• Chemical: Unipol polyethylene (when metal seated), dow polypropylene, PSA skids, silicon processing, high-cycle lock-hopper valves
• Gasification: Lock-hoppers, black water, syngas isolation
• Power: Bi-directional, low-pressure applications such as soot-blowers and chemical handling
• Specialty: Corrosive applications where seat material should be different than body material, high-cycle applications, bi-directional, double block-and-bleed

Two year warranty on parts and workmanship