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Valve valve
- DNN (Nominal Diameter): 15-300 (other diameters and pressures on requests)
- PN (Pressure rating): 10-420
Technology: Moulded or Forged
Principle: Valve
Markets:
- Chemistry
- Hydroelectric
- Oil/gas
Connection:
- Has flanges
- To weld
- Tapped
Type of connection:
- ANSI
- BSP/NPT
- BW/SW
- PN/ISO
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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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Check valves are poppet style elements that allow free flow in one direction while preventing flow in the reverse direction. They can be used to isolate portions of a hydraulic circuit or to provide a free flow path around a restrictive valve.
Types:
Nose to Side Checks
Soft Seal Check Valve
Side to Nose Check Valve
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The check valves permit flow in one direction only; the operation of the valve is based on the movement of a small disc. The disc shifts within the housing as the pressure differential changes from forward to reverse. A flat surface on one side of the disc seals off flow, while the other side allows flow to pass.
The check valves offer low "cracking pressure" and a minimum differential forward flow, less than 0.005 PSI in the standard units.
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The Copes-Vulcan Multiple Nozzle Spray Desuperheater offers optimum performance and rangeability in a variable spray tube design. The MNSD fills the performance gap between the limited capability of a simple mechanical spray type desuperheater and the virtually unlimited capability of Copes-Vulcans Variable Orifice Desuperheater. The MNSD offers high temperature capabilities and up to Class V leakage rating.
Features:
- Temperature control to within 15F (8C) of saturation with the ability to hold set point within a tolerance of 10 F (6C)
- Standard maximum available Cv of 10.5 (Kv of 8.9)
- Water flow turndown of 150:1 or higher
- User friendly design - nozzles and trim assembly can be removed without disconnecting the actuator
- No need for separate cooling water control valve
- Designed for applications with temperatures up to 1150F (620 C)
- Available in standard classes 600, 900,1500 and 2500 per ANSI B16.5
- Cooling water inlet pressures up to 3500 psig (24 MPag)(higher pressures on application)
- FCI 70-2/ANSI Class IV or Class V shutoff capability
- Suitable for vertical or horizontal installation
- Standard ANSI connections are 3" (80mm) raised face flange (steam) and 1.5" (40mm) raised face flange (water)
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The Hoffman Specialty Series 2000 consists of main valves, pilot valves, wells and hardware kits. They are designed to meet a wide range of temperature, pressure and capacity requirements and provide accurate, dependable, low maintenance operation. The Series 2000 Regulators meet MIL Spec MIL-V-16733D (Type IV) and MIL-V-18433B (Type I, Style A, Class 2).
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Cepex designs and manufactures an extensive family of check valves that can be used for a wide range of applications. These valves provide an exact and reliable control of fluids, and have been designed to offer maximum modularity and flexibility.
Spring check and ball versions are available in PVC-U and Corzan CPVC. As with other Cepex valve products, check valves are available in accordance with several dimensioning standards (Metric, BSP, ASTM, NPT, British Standard, JIS...).
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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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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 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 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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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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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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Opti-Gard is an advanced, reverse acting (compression loaded) bursting disc, peripherally scored on the vent side for accurate burst control. Elfab offer Opti-Gard as a single disc solution across a wide range of burst pressures and sizes.
With a 95% operating to burst pressure ratio, and performance tolerance of 3%, Opti-Gard offers the highest performance characteristics available for liquid, gas or vapour.
Standard features include: - non-invasive burst detection system, manufactured in corrosion-resistant Hastelloy and built in orientation enforcement.
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To determine the length of the syphon pipe, the following procedure must be used.
- Determine dimension "A": distance from center line of roll to inside face of roll.
- Calculate dimension "B": subtract dimension "X" (desired gap between inside face of roll to end of the angled syphon pipe) from dimension "A" (see step 1). B = A-X.
- Calculate dimension "Y": multiply dimension "B" by 1.130. Y = B x 1.130.
- Calculate syphon pipe length = "C" = Y-1.23.
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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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● 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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VSP safety valve
The over/under pressure VSP 273 Safety Valve has been engineered in order to protect silos and hoppers against occasional over - and under - pressures which can be generated by :
Pneumatic filling
Blockage of the vacuum cleaning filter
Fermentations
Variations in temperature
Condensation
The VSP 273 has been designed to only work on roof.
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Valves, Clappers, Bursting discs
