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Check Valves, PN16, DIN EN 3845-2
Bronze body, screwed cap in brass
Part No. 05011.X.0000
Female thread connection (G) acc. to ISO 7-1 Rp
Disc with FPM seal
Part No. 05012.X.0000
Female thread connection (G) acc. to ISO 7-1 Rp
Disc with PTFE seal
Available options - on request only:
* Disc with EPDM seal
* Disc with NBR sea
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Elastomer Hinge Design
Features
Unrestricted Full Port Seatless Design
- Maximum Flow Area
- Minimum Pressure Drop
Elimination of Metal-to-Metal Rotating Parts
- No Pins to Wear
- No Seats to Wear
- No Routine Maintenance
- No Spring to Break
Non Slam Quick Closure Feature
- Minimum Travel of Valve Plates from Full Open to Full Closed Position Reduces Closing Time
- Elimination of Spring Restricts “slamming” action
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Application:
To prevent reverse flow, e.g.
- Where two substances (liquids or gases) would mix with one another, preferably installed in both lines
- To prevent columns of liquids from draining out at the bottom when a pump fails
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Design utilizes all PTFE components and no o-ring to provide superior chemical resistance and purity.
Polished sealing surfaces provide long life and superior sealing characteristics.
Tongue and groove external seal eliminates o-rings and compatibility issues.
Machined PTFE spring provides low cracking pressure.
Numerous end configurations available which reduces connections, mounting space and overall cost.
Specifications
Wetted Materials
PTFE
Non-wetted Materials
PFA, PVDF, ETFE
Cracking Pressure
0.25 PSIG (.017 bar) - 0.75 PSIG (8.3 bar)
Back Check Seal Pressure
5.0 PSIG (.35 bar)
Pressure Ranges
0 - 120 PSIG (8.3 bar) See Cracking Pressure Chart in literature pdf.
Ambient Temperatures
32° - 212° F (0° - 100° C) for Style 1
50° - 212° F (10° - 100° C) for Style 2 and 3
60° - 212° F (15.5° - 100° C) for Style 4 and 5
Fluid Temperatures
32° - 266° F (0° - 130° C) for Style 1
50° - 266° F (10° - 130° C) for Style 2 and 3
60° - 266° F (15.5° - 130° C) for Style 4 and 5
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CAR967
Pipelines
CuAl or CuNi non-return valve for piplines dedicated to oxidising gas systems such as oxygen or neutral gas systems; 0 to 40 bar; orifice diameter 52 to 220 mm; all positions for installation
Brand :
Merobel
Working pressure :
40.00 bar
Gas :
Inert gases - Oxygen
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Check valves
They are used to prevent liquids, gases or steam back flow in pipes. They are also indicated to pumping or vacuum breaking applications.
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Non-return valves are essential devices for the satisfactory operation of high pressure piston pumps. Essentially, the non-return valve is a one-way valve that allows a liquid to flow through it in one direction but completely prevents its movement in the opposite direction
Standard Version Nominal width: DN 6 to DN 50
Rated pressure: Up to PN 260 bar
Operating temperature: -30 to +80°C
Operating medium: Gases and liquids
Installation position: Any
Connections: Threaded connections
Materials Body: 2.0967
Insert: 2.0967
Cone: 2.0958
Spring: 1.4310 coated
Seat seal: PA6.6
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Special design entailing practically no loss of head.
Body materials: Steel GE 280 or cast Iron GL 250 body, with or without coating.
Body coating: Ebonite, Butyl, Halar, Rilsan.
Hinge: Elastomer for all types of fluids.
Maximum operating temperature: 180°C.
Connection standards: Spacing NF.29 492, PN.10 - PN.16 and ASA 150
From DN.20 to DN.250
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WITT gas Non-return Valves protect equipment, pipelines and outlet points. Varying from 0.004 bar - 40 bar (0.06 - 580 psi) and flows between 0.010 m³/h - 3.000 m³/h (0.35 - 105925 SCFH) with any wanted connection. Nearly every application will find a solution when gas return has to be prevented.
Some non-return valves are flashback safe in accordance with EN 730 when natural gas and air are mixed, which can be mounted in nay position and do not require gravity.
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Brass Midi Check Valves
Description:
Series 6 Brass Midi Check Valves are used in general industrial and plumbing applications. They feature a brass body with NPT female threaded end connections and positive back stop. Series 6 has a silent operation with low opening pressure and low pressure drop. It can be installed in a horizontal or vertical position. Maximum Pressure: 200psi (13.8 bar).
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SWING CHECK VALVES,
SS316/SS304/WCB BODY,
FLANGED END OR THREADED END,
PRESSURE: ANSI150/300, PN16/PN40;
OR 200WOG
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Applications:
- Domestic hot & cold water
- HVAC (condensors, chilled water, hot water heating)
MATERIALS & CONSTRUCTION
- Two-piece bronze body
- Stainless steel stem
- Resilient disc (TFE)
- 200 PSI non-shock cold working pressure
- 250°F maximum operating temp.
Design criteria
- Conforms to MSS SP-80
- Inline lift type
- Spring actuated
- Dezincification resistant
- For connection to rigid copper tubing manufactured per ASTM B88, condition H (hard drawn). Not compatible with annealed (dead soft) copper
tubing
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* Simple installation to any 1/8” VGS™ accessory port.
* Prevents vacuum from being pulled through blow-off lines, which means faster response and completely independent VGS units.
* Suitable in applications where cleaning of the lines or suction cup filter is necessary.
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In addition to the main valve families mentioned above, ROSS EUROPA's line of pneumatics includes:
Check valves
Speed control valves
Manually operated valves
Mechanically operated valves
A broad line of accessories
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sf non return valves close the through flow in one direction (the return) and allow an almost unrestricted flow in the other direction (the flow). As long as the flow pressure is greater than the return pressure, the valve remains open (providing there is sufficient pressure acting against the spring). If the return pressure exceeds the flow pressure, the valve is pressed against the seat, thus closing the flow.
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Complete range of check valves available to suit any application;
* Effective minimal maintenance free solutions
* Preventing reverse flow in pipelines
* Compact design
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Presenting check valves for steam and other fluids. Check valves with disc and spring construction that assures performance with installation in either vertical or horizontal pipelines. Automatic valves for preventing backflow.
Operating Pressure Range: 0 - 425 psig
Operating Temperature Range: -148 - 662 °F
Reliable Backflow Prevention
Mechanically prevents backflow.
The valve seal provides an extremely tight seal.
Easy to Use
There are no restrictions on installation orientation (horizontal, vertical).
After the valve has closed, it opens again at the slightest pressure differential.
Long Service Life
TLV's unique center-guided disc (CK3MG, CKF3MG, CKF3RG) offers greater durability.
Application Areas
Suitable for use in the following applications:
CK3M, CKF3M, CK3MG, CKF3MG (metal valve seat) - steam.
CK3T (PTFE valve seat) - steam, hot water.
CK3R, CKF3R, CKF3RG ( Nitril or Fluorine rubber valve seat) - non-hazardous gasses, air, hot water, water, etc.
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The compact wafer-style design and round unobstructed port of the Tyco Prince Wafer-Check Valve tackle many tough applications throughout industry. Offering elastomer and polymer seating materials, it is heavily used in chemical, petrochemical, water/waste water, mining, HVAC systems, power, pulp and paper, refrigeration, agriculture, oil production and most other industrial applications. Available 2" through 48", Prince wafer check valves significantly minimize the required piping support, assuring low installation and maintenance costs when compared to traditional full-bodied check valves. Adaptable with outside lever and weights, internal or external springs, the Prince Wafer Check can solve many specific application problems.
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Check valves allow the flow of refrigerant in one direction only by automatically closing when fluid attempts to flow in the opposite direction. The check valves are used generally used to protect compressors, pumps but also other apparatus from damage by liquid refrigerant.
Several constructions of check valves are available. Revalco chooses for a spring loaded valve construction of which, when opened, the valve body is completely outside the main stream.
Advantages:
- Cage construction NB 100-150 (4"-6") prevents hammering or whistling as a result of too large/small valve
- Standard supplied as a PN40 design. (on request PN52).
- High Kv values resulting in low pressure drops.
- Modular buid up stop-, regulating-, check- and stop check valves makes possible chang-over in existing installation.
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Soft-Seat Copper Check Valves:
Parker's Soft-Seat Copper Check Valves are used in refrigeration and air conditioning systems to maintain flow in only one direction. Internal components seat or "check," preventing flow back through the valve. These products are often used in conjunction with dryers or strainers to ensure unidirectional flow, with compressors to prevent liquid refrigerant from flooding back to the inlet, or in system lines to redirect flow to another circuit.
Application:
• Refrigeration and air conditioning systems.
Features and Benefits:
• Soft-seat valve features a Neoprene™ o-ring that seals to a metal seat for low refrigerant leakage (10cc/min. compared to traditional check valves with 750 cc/min.).
• Brass piston seat and steel piston provide corrosion resistance and durability.
• Sweat connections in a variety of sizes provide for easy installation and simplified brazing.
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Parker's Copper Ball Check Valves are used in refrigeration and air conditioning systems to maintain flow in only one direction. Internal components seat or "check," preventing flow back through the valve. These products are often used in conjunction with dryers or strainers to ensure directional flow, with compressors to prevent liquid refrigerant from flooding back to the inlet, or in system lines to redirect flow to another circuit.
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The Y90 DONADON rupture disc is a compression (or reverse) disc peripherally scored.
The Y90 represents the high technology in the sector: the camber of the convex disc is not modified by the operating pressure except on reaching reverse pressure. Therefore this device works with ratios of up to 90% between operating and rupture pressure and withstands thousands of cycles without jeopardising its reliability.
At the moment of reversion the disc bursts in a few thousands of a second rupturing along the scored line without fragments
Y90 disc has lower sensitivity to variations in temperature than conventional discs and therefore is very useful in applications with large temperature variations.
It is especially suitable for use with gas and liquids, and for protecting pressure relief valves
The wide choice of materials and the thickness used make the Y90 disc very resistant to corrosion. Greater protection can be obtained with a PTFE lining, which can be applied to the process side of the disc.
Vacuum support is normally not required
Available in special execution certified Ex II 2GD according to European Directive 94/9/CE (ATEX)
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Donadon SCD is a compression (or reverse) disc with micro-scored calibrated section. Special feature of SCD is scoring in 6 sectors instead of 4 as usual in all competitors’ discs.
Opening in 6 petals allows a better opening reducing the risk of petal detachment even at high bursting pressure.
It is used with gas and liquids also in cycling and pulsating conditions without reduction of safety margins.
SCR disc reacts to excessive pressure in a few milliseconds without fragmentation.
It is especially suited for protection of pressure relief valves.
SCR disc may operate at 90% of the bursting pressure and has a very good resistance to corrosion due to the thickness of the material employed. Corrosion resistance may be additionally improved by PTFE lining.
Vacuum support is normally not required.
Available in special execution certified Ex II 2GD according to European Directive 94/9/CE (ATEX).
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Wafer type dual plate check valve
ND (nominal diameter): 50-1200
other diameters or pressures under request
NP (nominal pressure): 10-420
Technology: Molded
Principle: Double battant
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The Selas automatic firecheck, or flame arrestor, is basically a check valve which is closed by actuation of a thermal release. Components include a shut-off valve, check valve, corrugated fire screen, and a thermal latch. In normal operations, the combustible fuel/air mixture passes freely through these components. If flashback occurs,the sudden increase in back pressure will cause the check valve to close and momentarily interrupt the forward flow of the fuel/air mixture. The reduced flow and the internal configuration of the firecheck allow the backward-traveling flame to stop at the fire screen. The tiny holes and chilling capacity of the fire screen hold the flame on the screen until the thermal element is heated and releases the latch to close the shut-off valve. This valve-closure stops fuel/air flow and prevents the flashback from proceeding past the firecheck. The shut-off valve remains closed until manually reset.
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WITT safety devices are used to protect single cylinders, outlet points or pipelines against gas back feeding and flashback and meet various National and International Standards e.g. EN730. Appropriate checks are made by the certification authorities - BAM, TÜV and Underwriters Laboratories etc. Pressure control systems, points of use and complete energy supply systems (MECS) incorporate these devices.
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Firedamper, deck type
1 bladed, round Ø1400 mm
Insulation Class A-60
After Firetest
acc. SOLAS 1974 and IMO Res. A 754(18)
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Valves, Clappers, Bursting discs
