Relief valves

152 companies | 417 products
Valves
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unloading relief valve - max. 400 bar | A OPP series

Over pressure protectors:
As the name indicates, this device saves instruments from the over pressure. Gaugesavers close at a set point protects instruments...

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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 - DN 6 - 12, 15 bar

Description

System-medium controlled overflow valves are simple and compact regulating devices...

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unloading relief valve / low-pressure - MPV series

Integrated packages destined for screw or vane compressors, with temperature control functions, oil circuit, oil filtration, air oil separation, minimum pressure and check valve. Available in various sizes, to equip compressors with 3 to 30 Kw of power (flow rates from 0.3 to 4.5 m3/min)....

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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 - 30 - 210 bar

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

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unloading relief valve - 60 l/min, 320 bar | FT3 MO

Fluid flows freely on A, B, P, and T lines; when on service line, protected by the relief valve,...

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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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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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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 - 0.3 - 1.5 bar | VP150QT

Features
The pressure relief valve VP150QT have been specially designed for use on transformers in which is not admitted any external pollution due to oil released during its operation (i.e....

unloading relief valve - 0.35 - 0.84 bar | RT6 series

Features
When it is required to limit the pressure rise inside a tank, in order to prevent an excessive mechanical stress of the waits, it is necessary to use a safety valve set at a precise overpressure value. The tank of oil-immersed...

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unloading relief valve / hydraulic - 1/4 - 1/2

These adjustable, spring-loaded poppet valves are used to limit system pressure. Excess pressure unseats the poppet, allowing flow with minimal increase in system pressure. As fluid is released the system pressure decreases until the spring force...

cartridge relief valve / unloading / hydraulic - 1

The Kepsel® cartridge has the same internal features as its counterpart Kep-O-seal® adjustable inline relief valve. These adjustable, spring-loaded poppet valves are used to limit system pressure. Excess pressure unseats the poppet, allowing flow with minimal increase in system pressure. As fluid...

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unloading relief valve - max. 5.9 psi

The Aerodyne mini relief valve, Model 5280, provides precise pressure
relief of inert gases in a compact...

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unloading relief valve - max. 10 500 psig, -196...288 °C

Relief Valves

Circle Seal Controls Relief Valves

Choose from a wide...

unloading relief valve / low-pressure - 1/8 - 1/4

Features
Popoff or inline valves
Adjustable crack pressure
Zero leakage
Optional factory preset
Accurate set pressure
Wide range of cracking...

unloading relief valve - 0 - 25 psig | L500 series

Technical Data

Body Materials
Brass
...

unloading relief valve / stainless steel - 1/4 - 1/2

Features
Very accurate cracking pressure
Zero leakage up to 95% of cracking pressure
100% seat leakage tested
Tamper-proof adjustment
PED...

unloading relief valve / stainless steel - 1/8 - 1 1/4

Features
Zero leakage up to 95% of cracking pressure
Positive reseat at high percentage of cracking pressure
Accurate set pressure
Wide range of cracking pressure
Tamper-proof...

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unloading relief valve / proportional - 45 bar, 12 l/min | EPDBGA

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 / proportional - 45 bar, 12 l/min | EPDBGA

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 / proportional - 45 bar, 12 l/min | EPDBGA

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 / stainless steel - 0.2 - 16 bar | 35 series

Valves in food- and pharmacy design; different aseptic...

unloading relief valve - 0.4 - 120 bar | 4 series

Open discharge Safety Valves with screwed...

unloading relief valve / low-pressure - 0.05 - 10 bar | 6 series

Open discharge Safety Valves with screwed...

unloading relief valve / low-pressure - 0.05 - 3 bar | 67 series

Open discharge Safety Valves with screwed...

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unloading relief valve / pilot-operated - ±2 psi | 760, 761

Both models are designed to regulate valve inlet pressure within ±2...

unloading relief valve - 762 - 767

Models 762, 763, 765, 766 and 767 gas loaded relief / back pressure control valves are specifically designed to regulate and control maximum pipeline pressures or to maintain a minimum...

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