1.Application:
It is widely applied to stainless steel pipeline system to prevent liquid from flowing back.
When pressure of valve rod lower part exceeds pressure of valve rod upper part and spring force,the valve will start up
When pressure between upper part and lower part is in the state of balance,the valve will shut offf.
A higher reversing pressure is acted upon valve rod to make it.
2.Performance and merit:
(1)Valve wall steamlined design,a smaller flow resistance,a flow smooth.   
(2)Flexible seat seal.Sealing a better effect.
(3)Spring reduction and design,installation location unrestricted 
(4)Middle with clamp or flange design for easy maintance and clean.
(5)Forging valve,the pressure better.         
3.Part name:
Short body,long body,SS srcew,O-ring,Seal ring,SS spring,Flow support plate and Disc.
4.Technicas Data:

Standard	SMS,DIN,3A,IDF,ISO,RJT
Materail Quality	Stainless steel 304,316L
Size	1"~4",DN25~DN100,larger sizes are according to customers' design
Seal	Silicone,EPDM,PTFE,Teflon.All seal  materials comply with FDA177.2600
Temperature	-20Celsius degree~+135Celsius degree
Pressure	0bar~10bar
Connection Mode	Welded type,Clamped type,Threaded type
Internal Surface	<0.8um
Exterbal Surface	<1.6um
Processing Machine	the most advanced CNC machine from Japan for processing
Parts of Butterfly Valve	Valve body,handle,SS dish,Seal,Bolt,Platic Ball

5.Data For DIN Thread Check Valve:

Size	G	G	A
DN15	87MM	RD34*1/8MM	111MM
DN20	87MM	RD44*1/6MM	115MM
DN25	87MM	RD52*1/6MM	117MM
DN32	87MM	RD58*1/6MM	117MM
DN40	100MM	RD65*1/6MM	117MM
DN50	115MM	RD78*1/6MM	122MM
DN65	130MM	RD95*1/6MM	156MM
DN80	155MM	RD110*1/6MM	167MM
DN100	165MM	RD130*1/6MM	176MM

6. Packaging: In plastic first then in carton then in wooden case
7. Delivery Port: FOB Shanghai Port or Ningbo Port.
8. Shipment Terms: FOB, CFR, CIF, EX-WORKS
9. Payment Terms: L/C, T/T, D/P, Paypal, Western Union.
10. Minimum Order: 10 Sets.
11. Delivery Lead Time: 7 days after order is comfirmed.
12. Export Market: North America, South America, Southeast Asia, MID East, Western Europe and so on.

Contact:Ms.Sysyy Liu
M.B.:0086-13587646794