Relief valves

151 companies | 415 products
Valves
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unloading relief valve - 275 psi | BPRV™

Buckling Pin technology offers an accurate and reliable means of calibrating pressure relief devices. BS&B has developed the BPRV™ Buckling Pin Relief Valve for in-line pressure...

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unloading relief valve - DN 40 - 400, PN 16 | 1470

The 1470 series is a pressure surge relief valve engineered by Hawle. It is suitable for use in potable water.

The valve reduces water hammers in two automatic steps. It...

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unloading relief valve / high-pressure - 1/4

High Pressure, Low Flow
These valves are direct operated, differential poppet, dry spring chamber design....

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unloading relief valve - 30 - 210 bar

Pressure relief valves (shock valves), single and double-acting (KPDR,...

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cartridge relief valve / unloading / hydraulic - max. 50 l/min, max. 350 bar | CR series

— The CR valve is a direct operated pressure control valve
cartridge type that can be used in blocks or panels with
type D-10B seat.
— It is normally used to control the maximum pressure in...

cartridge relief valve / unloading / hydraulic - max. 100 l/min, max. 350 bar | CRQ series

— The CRQ valve is a pilot operated pressure control valve
cartridge type that can be used in blocks or panels with D-
10C type seat.
— It is normally used to control the hydraulic circuit pressure
and...

cartridge relief valve / unloading / hydraulic - max. 120 l/min, max. 380 bar | DBV series

— The DBV valve is a direct operated pressure control valve
cartridge type that can be used in blocks or panels with
seat.
— It is normally used to control the maximum pressure...

cartridge relief valve / unloading / hydraulic - max. 40 l/min, max. 350 bar | PCK06 series

— The PCK06 valve is a two or three-way pressure
compensator, cartridge type, for block or manifold
application.
— It keeps the pressure drop (characteristic Δp)...

unloading relief valve / direct-operated - max. 3 l/min, max. 350 bar | CD1-W series

— The CD1-W valve is a direct operated pressure control
valve with threaded ports and for flange mounting
installation.
—...

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unloading relief valve / direct-operated - max. 3 l/min, max. 350 bar | CD1-W series

BASIC FUNCTION
The basic function of a relief valve is either as a standby safety valve to limit system pressure, or as an active control valve used to maintain pressure at a specific level or over a desired range.

When used as a safety valve...

unloading relief valve / direct-operated - max. 3 l/min, max. 350 bar | CD1-W series

UNLOADING RELIEF
SOLENOID ACTUATED Two functions in one valve, unloading and relieving. Factory set relief pressure or adjustable option. Integral 250 micron pilot flow filter. Coil: Waterproof, hermetically...

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unloading relief valve / direct-operated - max. 3 l/min, max. 350 bar | CD1-W series

Pressure Relief Valves are quick-opening, quick-closing valves used to protect equipment from gas pressure build up or pressure surges. Standard applications involve steam, gases, or liquids...

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unloading relief valve - 1/2

The Siras boiler / heating system filling and drain valve has an optional hose connection made...

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unloading relief valve / pilot-operated - max. 3 550 psi, max. 400 lpm | RF-*xx series

RF series relief valve is designed on the theory of
differential pressure created by flow across the
orifice of...

unloading relief valve / pilot-operated - max. 3 500 psi, max. 200 lpm | HRF-G03, HRF-G06 series

RF series relief valve is designed on the theory of
differential pressure created by flow across the
orifice of...

unloading relief valve / hydraulic - max. 3 000 psi, max. 35 lpm | MRF series

-DESIGN NUMBER
-PRESSURE ADJUSTMENT RANGE
1 :8-70kgf/cm2 (120-1000PSI)
2:35-140kgf/cm2 (500-2000PSI)
3:70-210kgf/cm2t1000-3000PSI)
-ADJUSTMENT...

unloading relief valve / hydraulic - max. 3 000 psi, max. 70 lpm | MRF, MPR series

- DESIGN NUMBER
" PRESSURE ADJUSTMENT RANGE
1 :8-70kgf/cm2(120-1000PSI)
2:35-140kgf/cm2 (500-2000PSI)
3:70-210kgf/cm2(1000-3000PSI)
"...

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unloading relief valve - max. 36

The CLA-VAL Model 50-20 Seawater Service Pressure Relief Valve is designed...

unloading relief valve / pilot-operated - max. 12

The CLA-VAL Model 50B-4KG-1 Globe / 2050B-4KG Angle Pressure Relief Valve...

unloading relief valve / direct-operated - 1/2

The CLA-VAL Model 55L (UL Listed FM approved) Pressure Relief...

diaphragm relief valve / unloading - 1/2

The Pressure Relief Control is a direct acting, spring loaded,
diaphragm...

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unloading relief valve - DN 25 - 100 | VARIVENT® Q series

Overflow Valves Type Q series VARIVENT® are generally used as pressure relief valves in pipelines,...

unloading relief valve / for hygienic applications - DN 25 - 100 | VARIVENT® D-Force series

This new development avoids dead ends and unwanted product mix-up areas while providing a clean and hygienic production environment. The present...

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unloading relief valve / pilot-operated - 2 - 30 MPa | BP series

This valve reduces the circuit pressure down...

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unloading relief valve - GS 750

Zeppini GS 750 overfill prevention valve has been designed for avoiding any over-filling...

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unloading relief valve - 1/4

PRESSURE RELIEF VALVES
Angle & Straight-Thru Types (150-675 PSIG)

Brass construction set and sealed at the factory; all N.P.T.F. connections are
American Standard dry-seal tapered pipe threads
Valves...

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unloading relief valve - BLD6637/01

Two Way Relief Valves are designed for transit and storage containers but can also be used for electronic and electro-optics equipments. The valves have...

unloading relief valve - BLD8887/01-06

Two Way Relief Valves are designed for transit and storage containers but can also be used for electronic and electro-optics equipments. The valves have...

unloading relief valve - 3/4

Two Way Relief Valves are designed for transit and storage containers but can also be used for electronic and electro-optics equipments. The valves have...

unloading relief valve - BLD9146/01-05

Two Way Relief Valves are designed for transit and storage containers but can also be used for electronic and electro-optics equipments. The valves have...

unloading relief valve - BLD2778/01-06

Outward Relief Valves are designed for use in electronic and electro-optics equipments. The valves have pressure relief...

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unloading relief valve / pilot-operated - DN 25 - 100, 100 bar | RMG 850

Application Device for transmission and offtake stations as well as for power plants and industrial facilities
Full capacity relief valve
Axial flow with valve sleeve
Function Class A
Installation...

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unloading relief valve / pilot-operated - 1/2 - 12

Consider the safety rating, productivity value and cost savings of ERV – the relief valve whose standard blowdown and set pressure is accurate to 1/10% of 1 psi. Our Electronic Relief Valve (ERV) is the perfect combination of zero-leak-tested isolation valve...

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unloading relief valve - DN 100 - 400, PN 16 - 100, -30 °C ... +130 °C | SR 6.2

self-energized for extreme flow rates | straightway valve with optimised design with least possible flow...

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vacuum relief valve / unloading - 3

Are standard Air and Vacuum Valves mounted on a Surge Check Unit. The Air and Vacuum Valve operates in the normal fashion allowing air to escape freely at any velocity (maximum discharge velocity is approximately 300 feet per second at 6.7 PSI; however, good pipe line design restricts velocity flows of air to 10 feet per second which occurs...

unloading relief valve - 3/4 - 2

Fuel Service Air Release Valves operate while pressurized allowing entrained air to escape from the fuel pipeline, pump or reservoir...

unloading relief valve - 1/2 - 6

Air Release Valves function to release air pockets that collect at each high point of a pressured pipeline. Air...

unloading relief valve / for water systems - 1/2 - 1/4

Operate same as Air Valves for Water, differing only in appearance with elongated taller bodies. Elongated bodies minimize clogging by permitting use of a much longer float stem,...

unloading relief valve / for water systems - 1/2 - 4

Operate same as Air Valves for Water, differing only in appearance with elongated taller bodies. Elongated bodies minimize clogging by permitting use of a much longer float stem,...

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unloading relief valve - 2 - 3

Designed specifically for use as a...

unloading relief valve - 1 - 1 1/4

8543 Series relief valves are designed for use as a primary relief valve
in larger ASME...

unloading relief valve - 3/4

Designed specifically for use as a primary relief valve on forklift
cylinders, the 8545AK reduces the possibility of improper functioning
of the relief mechanism due to foreign...

unloading relief valve - 3/4 - 1 1/4

Designed for use as a primary relief valve on ASME containers such
as 250, 500...

unloading relief valve - 2

Designed especially for use as a primary relief valve on large
stationary storage containers,...

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