Consider the safety rating, productivity value and cost savings of electronic relief valve (ERV) – the relief valve whose standard blowdown and set pressure is accurate to 1/10% of 1 psi. ValvTechnologies’ ERV is the perfect combination of zero-leakage isolation valve plus the electronic controls needed to monitor and regulate system pressure. Use it in vital applications, where its ASME Sec. 1, V-stamp certification is required; or in process-critical over-pressure protection applications for extra safety assurance: ERV is the above-standard benchmark.
ValvTechnologies’ ERV fulfills the need for a zero-leakage, pilot-operated relief valve. The ERV package combines ValvTechnologies’ zero-leakage isolation valve with electronic controls to monitor and regulate system pressure. Whether in a capacity relieving function requiring the ASME V-Stamp or simply an overpressure protection application, the ERV provides reliable protection for standard safety valves in many industries. ValvTechnologies can also provide an integral isolation valve, eliminating the need for costly field welding. Standard blowdown and set pressure is accurate to 1/1000.
Integral metal seat.With our patented HVOF RiTech® coating process, the integral seat in ValvTechnologies’ rotary operating valves are resistant from the attack of abrasive magnetite or ferrous oxides 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 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.
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.
End cap. ValvTechnologies design utilizes a end cap with a diffuser outlet with optional end connections.
Zero-leakage guarantee comes standard
Eliminate the need for costly field welding with optional integral isolation valve
Flexible ½ to 12 inch sizing in ASME/ANSI Class 150 – 4500
Specially engineered for easy adaptation to existing control suites
Multiple actuator relief options – air, spring, hydraulic, AC/DC electric, failsafe and failsafe last position – extend applicability throughout plant or site
Weatherproof control box
Drip pans/exhaust pans
DSC signal input
Additional isolation valve
Four year zero-leakage guarantee in steam and water applications.