Tank venting

Pressure and vacuum relief valves for use in a range of tank storage applications.

We supply, fit, and service a wide range of pressure and vacuum relief valves for use in tank storage applications.

The devices allow bulk liquid storage tanks to vent during filling, emptying and when thermal effects require, preventing damage, minimising emissions, protecting the environment, and providing significant financial savings.

Emergency relief valves prevent against abnormal internal pressure beyond the capability of the pressure relief vent and costly tank ruptures.

Our free-of-charge site audits allow us to fully understand your requirements and specify the most appropriate components.

All our pressure only, vacuum only and combined pressure and vacuum relief valves are:

Compliant with ISO28300 (API2000).
ATEX-rated.
Factory leakage tested and calibrated for both pressure and vacuum.
Manufactured to ISO9001.
Supplied as standard with certified drawings, test certs, welding specs, material test certs; MIL certs & 3.1 certs.
Our emergency relief vents are weight-loaded with spring-loaded option available for higher pressure applications.

Standard features include:

Air cushion seat design offers the best seal integrity and won’t simmer like an o-ring seal.
Teflon diaphragms & Klinger seals offer longevity and extend service interval when compared to o-rings, PTFE or buna.
10% full lift design attains full stable lift at only 10% overpressure and offers near zero blowdown, meaning it re-seats near set pressure.
Stainless steel weights as standard mean clean, safe and hygienic operation.
Self-draining design features drip rings which prevent freezing due to condensate settling on seating surfaces.
Modular design means competitive pricing, faster deliveries and easy replacement of individual components if required.

Added value

Proven results

Successfully used globally by many major oil and tank storage companies.

Experienced

We have 170 years collective experience in the petrochemical sector, over 200 years in mechanical engineering and over 80 years in electrical engineering.

Bespoke

We always custom-build to your requirements.

Equipment

We hold strategic distribution partnerships with some of the best equipment manufacturers in the industry.

Site visit

We’ll carry out a site visit to understand exactly what you need.

Pressure relief valves

Pressure relief valves are specifically designed for storage tank protection when only pressure relief is required.

In addition to our standard features, our pressure relief valves are:

Weight loaded up to 60mbar, spring-loaded option available for higher pressure applications.
Available in end-of-line and pipe-away versions.
Available in top-mounted and side-mounted versions.
Available with integrated vacuum relief valve.

Pressure relief valve specifications:

Typical pressure range - Weight-loaded +2.0 mbar and +60 mbar. (+0.8 inch W.C and +24 inch W.C).
Spring-loaded +61 mbar and +1000 mbar (+24 inch W.C. and +400 inch W.C.).
Standard sizes - 2” to 12” (50 to 300mm) (others upon request).
Flanges - Class 150 RF, DIN PN16 (others upon request).
Body - Carbon steel, stainless steel, or aluminium (others upon request).
Seals - Nitrile, Teflon, and Klinger.
Pallet - Stainless steel AISI 304.
Paint finish - powder coating, colour RAL 9006, epoxy paint, colour RAL 9006, customer specification (upon request).
ATEX cert - Ex II 1/2 G c IIB.

Vacuum relief valves

Vacuum relief valves are specifically designed for storage tank protection when only vacuum relief is required.

Vacuum relief valve - weight loaded (end of line or pipe-away)

Pressure - Weight-loaded +2.0 mbar and +60 mbar. (+0.8 inch W.C and +24 inch W.C) (others upon request).
Standard sizes - 2” to 12” (50 to 300mm) (others upon request).
Flanges - Class 150 RF, DIN PN16 (others upon request).
Body - Carbon steel, stainless steel, or aluminium (others upon request).
Seals - Nitrile, Teflon, and Klinger.
Pallet - Stainless steel AISI 304.
Paint finish - Powder coating, colour RAL 9006, epoxy paint, colour RAL 9006, customer specification (upon request).
ATEX cert - Ex II 1/2 G c IIB.

Pressure relief valve - spring loaded (end of line or pipe-away)

Pressure - Spring-loaded +61 mbar and +1000 mbar (+24 inch W.C. and 400-inch W.C.) (others upon request).
Standard sizes - 2” to 12” (50 to 300mm) (others upon request).
Flanges - Class 150 RF, DIN PN16 (others upon request).
Body - Carbon steel, stainless steel, or aluminium (others upon request).
Seals - Nitrile, Teflon, and Klinger.
Pallet - Stainless steel AISI 304.
Paint finish - Powder coating, colour RAL 9006, epoxy paint, colour RAL 9006, customer specification (upon request).
ATEX cert - Ex II 1/2 G c IIB.

Combined pressure and vacuum relief valve

By using a combined unit, you only require one nozzle and have a single piece of equipment to maintain.

Combined pressure vacuum relief valve - weight loaded (end-of-line or pipe-away)

Pressure - Weight-loaded +2.0 mbar and +60 mbar. (+0.8 inch W.C and +24 inch W.C) (others upon request).
Standard sizes - 2” to 12” (50 to 300mm) (others upon request).
Flanges - Class 150 RF, DIN PN16 (others upon request).
Body - Carbon steel, stainless steel, or aluminium (others upon request).
Seals - Nitrile, Teflon, and Klinger.
Pallet - Stainless steel AISI 304.
Paint finish - Powder coating: colour RAL 9006, epoxy paint: colour RAL 9006, customer specification (upon request).
ATEX cert - Ex II 1/2 G c IIB.

Combined pressure vacuum relief valve - spring loaded (end-of-line or pipe-away)

Pressure - Spring-loaded +61 mbar and +1000 mbar (+24 inch W.C. and +400 inch W.C.) (others upon request).
Standard sizes - 2” to 12” (50 to 300mm) (others upon request).
Flanges - Class 150 RF, DIN PN16 (others upon request).
Body - Carbon steel, stainless steel, or aluminium (others upon request).
Seals - Nitrile, Teflon, and Klinger.
Pallet - Stainless steel AISI 304.
Paint finish - Powder coating: colour RAL 9006, epoxy paint: colour RAL 9006, customer specification (upon request).
ATEX cert - Ex II 1/2 G c IIB.

Combined pressure vacuum relief valve with combination inline deflagration flame arrester - weight loaded end-of-line)

Pressure - Weight-loaded +2.0 mbar and +60 mbar. (+0.8 inch W.C and +24 inch W.C) (others upon request).
Standard sizes - 2” to 12” (50 to 300mm) (others upon request).
Flanges - Class 150 RF, DIN PN16 (others upon request).
Body - Carbon steel, stainless steel, or aluminium (others upon request).
Seals - Nitrile, Teflon, and Klinger.
Pallet - Stainless steel AISI 304.
Paint finish - Powder coating: colour RAL 9006, epoxy paint: colour RAL 9006, customer specification (upon request).
ATEX cert - Ex II 1/2 G c IIB.

Emergency relief valve

Emergency relief valves provide emergency venting in the event of a fire.

Emergency relief valve specifications:

Typical pressure range- Weight-loaded +8 mbar and +50 mbar. (+3.2 inch W.C and +20 inch W.C), spring-loaded +50 mbar and +1000 mbar (+20 inch W.C. and +400 inch W.C.).
Standard sizes - 8” to 36” (200mm to 915mm) (others upon request).
Flanges - Class 150 RF, DIN PN16 (others upon request).
Body - Carbon steel, stainless steel, or aluminium (others upon request).
Seals - Buna-N, FEP, Viton.
Pallet - Carbon steel, stainless steel, or aluminium (others upon request).
Paint finish - Powder coating, colour RAL 9006, epoxy paint, colour RAL 9006, customer specification (upon request).
ATEX cert - Ex II 1/2 G c IIB.

Here to help with seamless delivery and management of your next process industry project.

Our experts are available to advise, support, and assist with any issues relating to your storage tanks and liquid process infrastructure ensuring you have a safe site, prevent any pollution, and remain operational.

Speak to our experts