Electronic Relief Valve

2 1/2” x 4” and larger

~4500#

Consider the safety rating, productivity value and cost savings of electronic relief valves – the relief valve whose standard blowdown and set pressure is accurate to 0.1% of 1 psi. Eraway's’ ERV is the perfect combination of zero-leakage isolation valve plus the electronic controls needed to monitor and regulate system pressures in a safety valve environment and within ASME Code Section I “V” Stamp requirements where critical over-pressure protection is paramount. Eraway's’ ERV is the benchmark.

Category to which it belongs

Globe Valve

Keyword

Eraway

Detailed Specifications
Feature
Advantage
Application

Commodity name: Electronic Relief Valve
尺寸范围: 2 1/2” x 4” and larger
压力范围: ~4500#

Size	2 1/2” x 4” and larger
Pressure Classes	ASME / ANSI class up to 4500
Materials of Construction	Carbon steel (A105, A216 WCB) – standard Alloy steel (F22, F91, A217 WC9, A217 C12A) – standard Stainless steel (316H, A351 CF8M) – standard Duplex steel exotic alloys Other materials available upon request
In Compliance	ASME B16.34 PED Nuclear ASME III Class 1, 2 and 3 Nuclear Safety Related – 10CFR50 Appendix B SIL
End Connections	Buttweld – standard Raised-face flange – standard Other end connections available upon request
Shutoff	Repeatable tight shut-off

- Eraway's’ ERV fulfills the need for a zero-leakage, pilot-operated relief valve. The ERV package combines Eraway's’ 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. Eraway's 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 Eraway's’ rotary operating valves are resistant from the attack of abrasive magnetite or ferrous oxides in the steam flow.
- Body seal ring. Eraway's 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. Eraway's design utilizes a end cap with a diffuser outlet with optional end connections.
- Tight shut-off: As a standard, Eraway's meets zero-leakage requirements on low-pressure air and high-pressure water
- High spring load: Eraway's’ very high spring load not only assures contact between the ball and seat, but at all positions from open to close
- Accuracy to 1/10% of 1 PSI: Pinpointed opening pressure
- High-precision reliability: Consistent reliable operation
- Low maintenance requirements: Low cost-of-ownership
- Accurate blow-downs: Major cost savings
- Seat out-of-flow path when open: Unimpeded flow path with no impingement
- Easily adapted to existing controls: Potential cost-saving when adaptable to existing controls
- Various standard control packages: Highly customizable
- Integral isolation valves available: Two valves in one for easy installation
- Full pressure protection: Maximizes over pressure protection
- Easily adjusted high and low set points: Ease if installation set up
- Secondary pressure signals can be taken from the boiler nozzle or any other source – customer’s choice: Installation flexibility
- Multiple signals can be prioritized: Operational flexibility
- Standard controls can be adapted to customer requirements: Installation flexibility
- DCS signal interfaces available as dry and wet contacts: User-friendly adaptability

Coking Isolation Valves

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