Us 3A Sanitary Stainless Steel Spring Check Valve

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SS304 Welding Flanged Check Valve with EPDM Gasket
Donjoy specializes in manufacturing and exporting valve,pump,fitting for over 20 years with good quality and pretty competitive price. Products are with 3A,CE,FDA cetification and production management is according to ISO9001-2008. With advanced technology,excellent quality and perfect after-sales service system, has been assessed as the national high-tech enterpries,the provincial famous trademark, the trocincial science and technology enterprises,innovative enterprises,patent model enterprises,R&D center,AAA credit enterprises. 

Check valve is for prevents the fluid from flowing back and ensures to flow in only one direction.
It can be used to prevent the flow less from returning avoid pipe hammering.
It is used in the food processing, beverage,wine,oil,cosmetics,pharmaceutical and chemical industries.

The valve open when the pressure of the fluid exceeds the pressure to spring, when the two pressure are equalised,the valve close.A stronger counter pressure also makes the valve close. 

Product nameSanitary Check Valve with Middle Clamp
Body Material AISI 304 or 316L (1.4301 / 1.4404)
Seat MaterialSilicone (default)
Seat OptionsEPDM or  (FPM)
Max. Working Pressure145psi (10bar)
Cracking Pressure4.35psi (0.3bar) for DN25
2.9psi (0.2bar) for DN32-40
1.45psi (0.1bar) for DN50-100
Working TemperatureEPDM: 14 ~ 248°F (-10 ~ 120°C)
Silicone: -58 ~ 356°F (-50 ~ +180°C)
(FPM): -22 ~ 428°F (-30 ~ +220°C)
Sterilization Temperature150°C (302°F), Max. 20 min
Internal FinishRa 16 ~ 32µin (0.4 ~ 0.8µm), Ra 32µin as default.
External FinishRa 16 ~ 32µin (0.4 ~ 0.8µm), Ra 32µin as default.
End Connectionsbutt-welded, sanitary tri-clamp, threaded or others upon request.
3A Hygienic Butt-Weld Ends Reflux Valve Prevent Backflow

Design Features

1.Vertical and horizontal design
2.No dead space and crevices
3.Fits to sanitary stainless steel tubing
4.FDA-approved elastomer materials: EPDM, Silicone,  (FPM).
5.Sanitary surface finish, available with Ra < 0.4µm or EP (SF1 and SF4)
6.A wide selection of different end connections

Clamped, welded and threaded,flanged etc. 

Packaging Details: 
Bubble pack for each valve.
Outside packing is by carton or plywood case.

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