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Reliable Pressure Relief:
Hayward Pressure Relief Valves protect piping system components from damage due to over pressurization. The valves work by sensing system pressure. When the system pressure exceeds the set pressure, the force of the excess pressure moves the valve piston off its seat to relieve the excess pressure and diverts some of the flow out the discharge port.
Easy to Set Pressure:
Hayward Pressure Relief Valves can be set by hand, no tools are needed, to relieve pressures from 5 to 75 PSI. Each size of relief valve is designed to cover this complete pressure range with just one, non-wetted, plastic coated spring. There is no need to change springs for different pressure ranges as with ordinary relief valves.
Molded Gauge Port:
An integrally molded 1/4" NPT gauge port on the valve body makes installation of a gauge to monitor the relief pressure easy. No drilling or extra fittings are needed.
No Corrosion Failure:
These all plastic relief valves have no metal parts and will never fail, jam or stick because of rusted or corroded components. They require no painting or epoxy coatings to survive corrosive environments.
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The Hygienic Opti-Gard system is a unique design specifically for aseptic and hygienic conditions providing a fully loaded technical solution with advanced detection and flexibility. The system offers significant benefits to everyone involved in the Specifications, purchase and operation of pressure management systems.
Hygienic Opti-Gard is non fragmenting and has a smooth uninterrupted surface finish to reduce contamination and maximise stream sterilisation (SIP) and clean-in-place (CIP) procedures. To facilitate installation Hygienic Opti-Gard is designed to fit directly between ISO2852 standard food industry couplings and clamp fittings.
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Pressure relief valve
- Reliable
- Compact form
- Maintenance free
- Use of non corrosive materials
- Easy disassembling and inspection
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Special features:
Soft tightness valve - Valve with balanced and of protection bellow - Valve with heating jacket - Valve with welding ends - Valve with lift indicator
Valve with reduced lift - Combined application valve / rupture disc - Valve with test gag - Valve with pneumatic actuator
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The ASTER ball valve, with full bore, is compact, flexible and easy for installing.
Blow-out proof system, with perfect air bubble sealing, does not need any maintenance, is equipped with wrapping seats ensuring long life cycles. The stem packing is composed of 3 seals: two o-rings for low pressure and an antifriction ring in PTFE for high pressure.
All valves are tested at 25 bar pressure, for a period longer than 48 hours.
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A broad line of Safety Relief Valves is available from Conbraco for many applications, including commercial and industrial uses. We have valves for Hot Water Boilers, valves for Low Pressure Steam, and High Pressure Valves for steam, air, and non-hazardous gas. Our safety relief valves are certified and made of high quality materials. Conbraco setting stations provide service you can count on, too.
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The Parker RH Series Relief Valves are proportional high pressure relief valves. A relief valve is primarily used to discharge excess system pressure to a safe point of release.
In operation, when upstream pressure exceeds the force exerted by the spring on the seat, the poppet opens, permitting flow through the valve. In a proportional relief valve, the higher the upstream pressure, the greater the poppet lift.
The RH Relief Valve has been designed with a captured molded seat design, resistant to blow-out and chipping.
The Parker RL Series Relief Valves are proportional low pressure relief valves. A relief valve is primarily used to discharge excess system pressure to a safe point of release.
In operation, when upstream pressure exceeds the force exerted by the spring on the seat, the poppet opens, permitting flow through the valve. In a proportional relief valve, the higher the upstream pressure, the greater the poppet lift.
The RL Relief Valve has been designed such that the cracking pressure is only sensitive to the upstream pressure and is not influenced by downstream pressure.
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The PLC series auxiliary valves are direct-acting, factory-set pressure relief valves of the cartridge type that can be supplied with or without a threaded plug. They can also be supplied with housings to facilitate in-line installation. PLC valves are intended primarily to act as combined pressure-relief and anti-cavitation valves - otherwise known as port relief valves - in the service ports of our directional valves. However, they can also be used to advantage in other situations where pressure relief valves in this size range are required. Indeed, PLC cartridge valves are purchased in great quantities by several of the world%u2019s leading pump and transmission manufacturers.
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Series 6400/6600
ASME NB Certifi ed: Steam & Air
Sizes 1 X 2 to 4 X 6. Actual orifi ce areas from 0.150 to 7.087 square
inches. Pressures from 15 to 1500 psig. Temperature range from -20 F
to +1000 F. Steel body and bonnet with stainless steel trim.
Double blow down ring design meets the requirements of Section I of
ASME Code. Temperature equalizing disc for maximum seat tightness. Available
with exposed spring (6400) or closed bonnet (6600). Full nozzle design
for ease of maintenance.
Applications: steam boilers (6400) and organic fl uid vaporizers or hot water
boilers (6600).
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High Pressure, Low Flow
These valves are direct operated, differential poppet, dry spring chamber design. All ports can
accept full working pressure permitting their use also as a sequence valve or back pressure
controller regulator (BPR). Wetted alloys are stainless steel. Dynamic seals are UHMWPE. Static
seals are Buna. Optional: Viton add-V. EPR add-E. Wrench flats are standard on adjusting screws.*
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LMI's diaphragm back pressure/anti-syphon valves apply positive discharge pressure to a metering pump system and act to stabilize the output of higher output LMI Metering Pumps when pumping into low or no-pressure systems. Pressure relief valves are designed to protect chemical feed systems from overpressure damage caused by defective equipment or deadheading. Valves are available in 1/4", 1/2", and 1" sizes in PP, PVC, PVDF, and 316SS.
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Series 4200
ASME NB Certifi ed: Steam
Sizes 1-1/4 X 1-1/2 to 6 X 8. Actual orifi ce areas from 0.316 to 11.39 square
inches. Pressures from 15 psig to 1000 psig. Temperature limit to 1000 F. Steel
body and open bonnet with stainless steel trim. Chrome moly body above 800 F.
Double adjusting ring design to meet the blow down and overpressure standards of
Section I of the ASME Code. Temperature equalizing disc for maximum seat tightness.
Full nozzle design for longer life and ease of maintenance. One piece guide mounted
low in the body for positive alignment.
Applications: steam boilers
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Pressure Relief Valve type LV / LNV
The safe and economic solution to protect your pump and plant against over-pressure.
Function:
The pneumatic Pinch Valve will be pressurized through the pressure relief section by a minimum differential pressure of 2 bar air supply over medium pressure. When the medium pressure in the pipeline increases, the Pinch Valve start to open and the overpressure passes trough the bypass and the Pinch Valve.
The rising and falling pressures can be controlled over pressure switches.
Type LV (if control air is available) and Type LNV (if control air is not available) are especially designed to handle products with solids, paste and fibers.
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Series 3800
ASME NB Certified: Air, Steam & Water
European CE Approved
Sizes 1″ X 2″ to 12″ X 16″. Actual orifice areas from 0.15 to 109 square inches. Pressures
from 20 to 6170 psig. Temperature range of -450 F to +500 F. Steel body and
bonnet with stainless steel trim. Semi-nozzle design.
The D to T orifices meet API Standard 526 covering orifice areas and center-toface
dimensions. Full bore designs available with 1″ through 12″ inlets and orifice
areas from 0.719 to 109 square inches giving maximum capacity for a given inlet size.
All stainless snap acting and modulating non-flowing pilot controls minimize product
loss and provide maximum resistance to corrosion.
Standard O-ring elastomer seat main valve and pilot control minimizes fugitive emissions
and allows operation within 95% of set pressure. Materials include Viton, Buna
N, ethylene propylene, silicone and Teflon. Optional materials of construction include
complete 316 stainless steel.
Applications: air, steam, gas, vapor, and liquid services where maximum seat tightness,
operating pressures and precise adjustment are required. Excellent for natural
gas pipeline and compressor service.
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● Low Lift Safety Valves
● Material: Body-Cast Bronze, Valve Seat-Brass
● Orifice Size: 1/2"(15mm), 3/4"(20mm), 1"(25mm), 1"(32mm), 1"(40mm), 2"(50mm)
● Working Pressure: 2~10 kgf/cm, 11~20kgf/cm
● Working Temperature: -45~+185C
● Working Fluid: Noncorrosive gas, noncorrosive liquid, air, steam
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Series 2700
ASME NB Certified: Air, Steam & Water
European CE Approved
Sizes 1/2%u2033 X 1%u2033 to 1-1/2%u2033 X 2-1/2%u2033. Effective orifice areas from 0.068 to 0.573
square inches. Pressures from 15 to 6500 psig. Temperature range of -450 F
to +750 F.
Stainless steel body and trim with carbon steel bonnet. Optional materials of
construction include complete 316 stainless steel, Monel, and Hastelloy C.
Materials suitable for NACE service available.
Available with threaded, flanged, socket weld, welding nipple or sanitary connections.
Optional O-ring seat for ultimate tightness. Maximum blow down
of 10% to 20% on all fluids. Balanced design available in %u201CC%u201D and %u201CD%u201D orifices
which nullify effects of backpressure.
Applications: air, gas, vapor, and liquid process service.
Series T6000
Series
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L-O-X energy isolation valves are designed to shut off the air supply and exhaust downstream air. This product can be locked and padlocked in closed position, and serves as an energy isolation device as defined by DIN EN 1037 "Safety – Machinery".
EEZ-ON valves are designed for a gradual buildup of downstream air pressure. This permits cylinders or other work elements to move slowly into their normal working positions before full line pressure is applied.
Consolidated L-O-X/EEZ-ON valves combine both pressure buildup and energy isolation functions. They can also be used as energy isolation devices as defined by DIN EN 1037 "Safety – Machinery".
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Revalco Safety valves are springloaded safety devices for protection against inadmissable pressures.
The valves can be used for protection of pressure vessels, compressors, liquid lines and in all places where overpressure could severely damage the installation and/or the surroundings
Working media
Applicable for all common refrigerants such as NH3, R22, R134A, R404A, R502, R507, R404A, R407C, R410A and non-corrosive gases/liquids. When using brines or refrigerants other then the above mentioned please consult your local Revalco representative.
Testing and Certification
Every valve will be calculated according to EN13136 and factory tested according to EN12284. The Design is according to CE PED 97/23/EC.
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Series 1890/1896M
ASME NB Certifi ed: Air, Steam & Water
Sizes 1/2 X 1 & 3/4 X 1 (1890) and 1/2 X 3/4 & 3/4 X 3/4 (1896M).
Effective orifi ce areas of 0.077 (liquid) and 0.089 (vapor) square inches. Pressures
from 15 to 800 psig for stainless steel (1890) and 15 to 300 psig for bronze
(1896M). Temperature range from -20 F to +750 F (1890) and -450F to +400F
(1896M).
Materials of construction include stainless steel body and trim (1890) and brass
body and trim with bronze bonnet (1896M).
Applications: air, steam, gas, vapor and liquid process applications (1890) and
where service is compatible with brass and bronze (1896M). Also suitable for
cryogenic applications.
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The RV-5200 and RV-5300 Series operate as either a relief valve or low flow back pressure regulators. Adjustments are made through a non-rising stem available with an attractive knob, plain to allow insulation of OEM knobs, or flush for "back panel" applications. A typical application would be the use of a unit between a compressor and a load to prevent the compressor from "loading up" when dead-ended.
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