Model NO.: check valve
Application: Industrial Usage, Water Industrial Usage, Household Usage
Size: Dn25-Dn100, 1′′-4′′
Connection: Weld, Thread
Trademark: DONJOY
Transport Package: Standard Exporting Package
Specification: CE, ROTHS, SGS
Origin: Wenzhou, Zhejiang, China
HS Code: 8481300000
Dn25-Dn100 316L Welding Stainless Steel Three Piece Check Valve Applications:
Check valve is a valve that 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, beverages, wine, oil, cosmestics, pharmaceutical and chemical industries.
Operating principle:
The valve opens when the pressure of the fluid exceeds the pressure to spring, when the two pressures are equalised, the valve closes. A stronger counter-pressure also  makes the valve close.
Design and features:
Easy disassemble
Small-size construction
DIN11851 connections(standard)
Specification
| Sizes | DN40/1.5'' to DN200/8'' |
| Max pressure: | 10bar |
| Opening pressure | 0.3bar(DN25) |
| Â 0.2ar(DN32/40) | |
| Â 0.1bar(DN50/100) | |
| Working temperature | -10 degree c to 120 degree c(EPDM) |
| Connnections: | weld, thread, clamp, DIN, SMS ,RJT, Â IDF, ISO, 3A |
| Seals material | NBR, FPM(Viton) or PTFE, All of them according to FDA 177.2600 |
| Application scope | food-processing, beverage, wine, oil, cosmetics, pharmaceutical and chemical industries |
| Packaging details | standard exporting package |
| Delivery details | usually within 20 days after receiving T/T down payment |
Materials:
Casing / shaft AISI 316L/AISI304
Spring AISI 301
EPDM Seal according to FDA 177.2600
Surface finishing Ra≤0.8μm
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