Pressure Vacuum Relief Valve (Breather Valve)
The VALMERU ES/IS Pressure Vacuum Relief Valve (PVRV), also known as a Breather Valve, protects storage tanks against excessive pressure and vacuum during routine tank breathing. Engineered for reliable routine service, the VALMERU breather-valve series combines tank protection with effective vapor-loss control for demanding storage applications.
DESCRIPTION
Designed as an ideal routine-service safety device for closed storage tanks, ES/IS provides ultimate protection against hazardous overpressure and vacuum conditions. Its precision weight- or spring-loaded mechanism helps minimize evaporative product loss, restrict unnecessary atmospheric air intake and protect tank structural integrity in severe industrial environments.
BENEFITS
- Dual-Protection for Pressure & Vacuum
- Minimized Product Evaporative Loss
- VOCs Reduction & Environmental Compliance
- Prevention of Tank Rupture & Collapse
- Precision Weight or Spring-Loaded Design
- High-Corrosion Resistance for Severe Environments
SPECIFICATIONS
- Size : 1 inch (ND 25A) ~ 12 inch (ND 300A)
- Pressure Setting Range : 20 mmH2O ~ 9000 mmH2O
- Vacuum Setting Range : 20 mmH2O ~ 700 mmH2O
MATERIALS
| No. | Description | Spec. 1 | Spec. 2 | Spec. 3 |
|---|---|---|---|---|
| 1 | Body | A216-WCB | A351-CF8M | B26-319 |
| 2 | Cover | A283-C | A351-CF8M | B26-319 |
| 3 | Disc | A240-304 | A240-316 | A240-304 |
| 4 | Seal | TEFLON | TEFLON | TEFLON |
| 5 | Seat | A351-CF8 | A351-CF8M | A351-CF8 |
| Special materials can available upon request | ||||
ES/IS – Pressure/Vacuum Relief Valve (BREATHER VALVE) FAQ
When should I use an ES/IS breather valve rather than an emergency vent?
ES/IS is intended for routine pressure and vacuum breathing of a storage tank. An emergency vent such as E30A/B is intended for abnormal high-capacity relief conditions that exceed normal venting requirements, so the two devices serve different protection functions.
What size and pressure/vacuum setting ranges are available for ES/IS?
ES/IS is available from 1 inch (ND 25A) to 12 inch (ND 300A), with pressure settings from 20 to 9,000 mmH2O and vacuum settings from 20 to 700 mmH2O.
What material options are available for ES/IS?
The listed material sets include carbon steel, stainless steel and aluminum-alloy body options, and special materials are available on request.
What tank information is useful for ES/IS selection or quotation?
Useful information includes tank design and operating pressure limits, required pressure and vacuum set points, connection size, expected venting requirement, stored product or service conditions and material requirements.