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Electronic Relief Valve
Brand: ValvTechnologiesConsider 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.
Features- 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.
Specifications
Brand
End Connections
- Buttweld - Standard
- Other End Connections Available Upon Request
- Raised Face Flange - Standard
In Compliance
- ASME B16.34
- Nuclear ASME III Class 1, 2 & 3
- Nuclear Safety Related - 10CFR50 Appendix B
- PED
- SIL
Materials of Construction
- Alloy Steel (F22, F91, A217 WC9, A217 C12A) - Standard
- Carbon Steel (A105, A216 WCB) - Standard
- Duplex Steel Exotic Alloys
- Other Materials Available Upon Request
- Stainless Steel (316H, A351 CF8M) - Standard
Pressure Classes
- ASME /ANSI Class 150-4500
Shutoff
- Various Control Packages Available Integral Isolation
Sizes
- 1/2 - 12 “