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Technical Datasheet -- Pressure Vacuum Relief Vents for Atmospheric Storage Tanks
Pressure vacuum relief vents (breather valves) for atmospheric and low-pressure storage tanks. Weight-loaded, spring-loaded, or pilot-operated pallet opens at set pressure to vent excess pressure or admit air on vacuum, preventing tank rupture and implosion. Aluminium, carbon steel, SS316, or ductile iron body. PTFE/RPTFE or graphite seat facing. Flow capacity rated per API 2000 / EN ISO 28300. ATEX / IECEx compliant for explosive atmospheres. In-situ set pressure verification without removal.
| Parameter | Specification |
|---|---|
| Product Type | Breather Valves |
| Category | Safety & Relief Valves |
| Size Range | 2" to 12" (DN50 to DN300) |
| Pressure Setting | Pressure: +2.5 mbar to +69 mbar (+1 inch WG to +28 inch WG) -- Vacuum: -2.5 mbar to -69 mbar (-1 inch WG to -28 inch WG) -- higher settings on request |
| End Connections | Flanged RF per EN 1092-1 PN10/PN16 / ASME B16.5 Class 150, Threaded NPT / BSP (2" to 4"), Tri-clamp (sanitary, on request) |
| Body / Housing Material | Aluminium alloy (lightweight, standard for atmospheric tanks) / Carbon Steel ASTM A216 WCB epoxy-coated / SS316 ASTM A351 CF8M / Ductile Iron EN-GJS-500-7 epoxy-coated |
| Pallet / Seat Material | SS316 with PTFE or RPTFE seat facing / Aluminium with PTFE facing (lightweight) |
| Guide Material | SS316 guide rods and bushings / PTFE-lined guides (low friction) |
| Gasket Material | PTFE / RPTFE / Graphite with SS316 spiral wound (high temp) |
| Set Pressure Type | Weight-loaded (deadweight pallet, simplest, most reliable) / Spring-loaded (compact, higher settings, less sensitive to vibration) / Pilot-operated (tightest shutoff, highest capacity, remote sensing) |
| Flow Capacity | Rated per API 2000 / EN ISO 28300 at 100% overpressure (or 10% overpressure for pilot-operated) |
| Leakage | Near-zero leakage below set pressure (weight-loaded: bubble-tight; spring-loaded: < 1% of rated capacity at 90% set pressure; pilot-operated: < 0.5%) |
| Temperature Range | -40 deg C to +60 deg C (aluminium body) -- up to +150 deg C (CS/SS316 body with PTFE seat) -- up to +300 deg C (CS/SS316 body with graphite seat, on request) |
| Component | Material |
|---|---|
| Aluminium Alloy | Aluminium alloy body and pallet (lightweight, standard for atmospheric tanks, non-corrosive hydrocarbons) |
| Carbon Steel | ASTM A216 WCB epoxy-coated body and housing (industrial, higher pressure settings) |
| Stainless Steel | ASTM A351 CF8M (SS316) body, pallet, and guide (corrosive / marine / food-grade service) |
| Ductile Iron | EN-GJS-500-7 (GGG50) epoxy-coated body (economical water / wastewater tanks) |
| Test | Requirement |
|---|---|
| Testing | Hydrostatic shell test 1.5 x WP per API 598 / EN 12266-1; Seat leakage test per API 598 / EN 12266-1; Functional test -- full stroke, torque; Material certificates per EN 10204 3.1 |
| Certification | ISO 9001:2015 QMS, EN 10204 3.1 material certificates, hydrostatic and seat test reports |
| Standard | Description |
|---|---|
| Design Standard | API 2000 Venting Atmospheric and Low-Pressure Storage Tanks, EN ISO 28300 Venting of Atmospheric and Low-Pressure Storage Tanks, ATEX Directive 2014/34/EU |
The Breather Valve / Pressure Vacuum Relief Vent -- API 2000 is designed, manufactured, and tested in accordance with applicable API / ASME / BS / ISO international standards. Compliance documentation and Material Test Certificates (EN 10204 3.1) are provided with every order.
Standard construction is carbon steel, stainless steel (CF8 / CF8M), and special alloy grades. Alternative and upgraded grades -- Duplex, Super Duplex, Inconel, Monel, Hastelloy, and NACE MR0175 trims for sour service -- are available on request.
It is offered in a range of sizes as per the technical specification with standard ANSI / ASME pressure classes (PN ratings on request). End connections include flanged (RF / RTJ), butt-weld, socket-weld, and screwed ends as per specification.
Yes. Supreme Valves India is an established exporter of industrial valves to Saudi Arabia (KSA), the UAE, Qatar, Kuwait, Oman, Bahrain, and across the Gulf. We provide sea-worthy export packing, EN 10204 3.1 / 3.2 certification, certificate of origin, and support for SABER / SASO conformity on KSA shipments.
Every valve undergoes hydrostatic shell and seat testing per API 598 / ISO 5208. Documentation includes EN 10204 3.1 MTC (3.2 on request), NDT reports, and fire-safe (API 607) or NACE MR0175 certification where applicable. Third-party inspection by TÜV, SGS, Bureau Veritas, or Lloyd's Register can be arranged.
Order quantities are flexible -- from single units for stocked items to bulk volumes for project requirements. Lead time depends on size, material, and quantity; please contact our team with your specification for a firm delivery schedule and quotation.