The flagship of the ValvTechnologies’ product line, the V1-1, is the valve by which all other severe service metal-seated ball valves are measured. The V1-1 design includes integral seats, RiTech® hard coatings, blowout-proof stem and live-loaded packing. Primarily used in severe service applications, V1-1 valves are manufactured to each customer’s unique specifications.
The V Series’ proven seat supported design provides improved performance, far beyond the capability of linear operated valves which feature obstructed and torturous flow paths. ValvTechnologies’ design and construction delivers the extra safety margin so crucial to maintaining productivity: customers benefit by realizing increased security, less downtime and lower maintenance.
V1-1’s are engineered to be leak-free, maximize flow and reduce the overall cost of ownership. So confident of their performance, only ValvTechnologies’ V1-1 valves are backed by the best four year, zero-leakage warranty in the industry*.
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.
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
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.
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.
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.
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.
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
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 V1-1 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 V1-1 valve by the end of day Saturday, the very same day the emergency request was received.
The customer received the V1-1 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.
Location: Poland Plant type: Lignite UNIT 470 MW – supercritical Industry: Power Application: Spray water control
Background: Power plants around the world commonly use ball valves to control high-pressure spray water in their cooling towers. In these towers, water is sprayed through pressurized nozzles for cooling and reuse. A power plant in Poland was utilizing globe valves instead of ball valves for their spray water control. Their particular application required the valves to open and close at rapid speed. For this application, the globe valves were failing continuously, resulting in control loss of the spray water and decrease in plant efficiency. Additionally, the globe valves’ stem packing was tearing, causing high-pressure, high-temperature water to be sprayed around the malfunctioning valves, creating a dangerous environment for operating staff.
Requirement: The customer requested ValvTechnologies review their spray water application and recommend an alternative solution that would replace their bare stem valves but keep the existing actuators and positioners. They also required each gearbox be replaced and changed to rotating movement from linear movement. Additionally, all valves provided were required to be in accordance with FED and CE requirements. Most importantly, the plant required each valve to function without issue and without the replacement of any stem packing for a period of one year from the date of install.
Solution: The ValvTechnologies’ high-performance V Series ball valve was identified as the best solution for this application. Per the customer’s specification, eight V1-1 valves were installed to replace the existing globe valves. After one year of operation, ValvTechnologies inspected the eight valves using an endoscope and found no sign of erosion or stem-packing problems. See photo 1 and 2 below. Plant management has approved the replacement of all globe valves used for spray water control to ValvTechnologies’ V Series ball valves. ValvTechnologies’ provided this customer with the best total cost of ownership solution available. ValvTechnologies was able to eliminate an unsafe environment, increase the quality of the spray system and improve plant efficiency.
Customer: Combined cycle power plant Location: United Kingdom Plant type: Fossil power Products: V Series and IsoTech®
Background: A low-carbon economy is a concept that refers to an economy which has a minimal output of greenhouse gas emissions into the biosphere, specifically greenhouse gas, carbon dioxide (CO2). A power station near the town of Selby, England, is the largest, cleanest and most efficient coal burning power station in the United Kingdom. With a generating capacity of 3,960 megawatts, its current output levels generates enough electricity to meet the needs of seven percent of the United Kingdom. Understanding they have a very important role to play in the transition towards a low-carbon economy, this power station is committed to reducing hazardous emissions and has various projects ongoing which will not only reduce emissions, but deliver significant savings.
Solution: Severe service valve leakage significantly reduces a plant’s heat rate performance, because BTUs leak away, never reaching the turbine. By utilizing ValvTechologies’ V Series metal seated ball valves and IsoTech® parallel slide gate valves for vents and drains, steam and water leakage is eliminated, improving the plant’s thermal efficiency. Additionally, less fuel is burned to produce megawatts, which not only leads to lower emissions, but improved plant efficiency.ValvTechnologies’ high-performance zero-leakage isolation valves typically improve a plant’s heat rate performance by 1-2%, even up to 5-6% in some cases. In 2004 ValvTechnologies began suppling this power station with V Series severe service ball valves for problem areas such as drains and bypasses.
Result: Due to the V Series valves reliability of isolation provided on the plant’s drains and bypasses, the plant began using ValvTechnologies’ IsoTech® valves their feed waters systems (start and standby feed pumps, HP heater feed inlet and outlets). The feed system pumps powerfully move water at a rate of 150 gallons every second. The IsoTech® valves provided single isolation, allowing maintenance to be carried out on tube leaks without shutting down the entire system. ValvTechnologies’ zero-leakage valve range is seen as a solution provider where isolation is required for critical and severe service applications, and the way forward in helping achieve the targets set for reducing emissions.
Attemperator Spray Block Valves
It is critical to chose the correct valve specifications when it comes to attemperator block valves. When zero leakage is demanded for improved plant heat rate efficiency and for overall increased megawatt output, ValvTechnologies offers its’ V series, zero leakage, metal seated ball valve for attemperator spray block valve applications.
All dimensionsal data is approximate, contact factory for certified dimensions
Bill of Materials
Since the pipe I.D. and corresponding transition from valve I.D. to pipe I.D. has a critical impact on the Cv of the valve, we have devised the above table. This table gives the Cv based on industry standard pipe and also the maximum Cv of the valve only. For Cv with other pipe I.D. or bore size, consult factory. Cv values are approximate, contact factory for exact Cv values.;
HVOF RiTech® Coatings
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
Special end connections available
Class V sealing in the reverse direction
Complete automation packages available
Oval hand wheel
Fossil Power Applications
Above and below seat drains
Attemporator spray control
Boiler feed pump isolation
Continuous boiler blowdown
Feedwater heater drains
Main steam stop
Seal steam regulators
Sight/gauge glass drains
Soot blower regulators
Turbine bypass systems
Nuclear Generation Applications
Circulating water system
Condensate cooling water
Fire protection system
HP safety injection
HP & LP heater drains
Heat exchanger vent & drains
Main steam system isolation, drain & vent
Power operated relief valve (PORV)
Pressurizer drain & vent
Rad waste system
Reactor coolant pump drain & vent
Reactor head vents
Reactor water cooling vents & drains
Safety injection system
Secondary system isolation, drain & vent
Service water system isolation
Steam generator system
Turbine drain & vent
Fukushima tie ins
Reliable hardened vents
Upstream Oil and Gas
Wellhead choke isolation
Compressor recycle and isolation
Sour gas isolation and control
Steam, water and gas injection
Pig launcher and receiver
Mud drilling isolation and check
Lean & rich amine isolation
Molecular sieve regeneration isolation
Molecular sieve absorber isolation
First and second stage separator isolation
Downstream and Chemical Processing
Coking (delayed & flexi)
Overhead vapor line
Cutting water isolation
Fluidized catalytic cracking
Slurry isolation & control steam