Check Valve factory 
Product Description Price: The price is changing because of material cost and 
exchange rate. Please give me your contact information, I will update the newest 
price to you * Nominal size: 4"-180", DN100-4500 * Pressure rate: Class 
600LB-2500LB,PN100-PN420 * Pressure grade:1.0-4.0MPa * Connection Type: Flanged 
ends * Material: WCB, WCC, WC6, WC9, LCC, LCB, CF8, CF8M, CF3, CF3M, A1105, LF2, 
F91&Other material as client required * Operation: Hand wheel, Bevel 
gearbox, Pneumatic,Electric * Suitable Temperature: -29掳C~425掳C * Connection: 
ASME B31.4 , ASME B31.8 ,ANSI B16.25,ANSI B16.5 ASME B16.47A * End to End: API 
6D, ASME B16.10 * Test and Inspection Standard:API 6D,API 598,EN12266 * Country 
of origin:China A check valve, non-return valve, reflux valve, retention valve, 
foot valve, or one-way valve is a valve that normally allows fluid (liquid or 
gas) to flow through it in only one direction.[1] Check valves are two-port 
valves, meaning they have two openings in the body, one for fluid to enter and 
the other for fluid to leave. There are various types of check valves used in a 
wide variety of applications. Check valves are often part of common household 
items. Although they are available in a wide range of sizes and costs, check 
valves generally are very small, simple, and inexpensive. Check valves work 
automatically and most are not controlled by a person or any external control; 
accordingly, most do not have any valve handle or stem. The bodies (external 
shells) of most check valves are made of plastic or metal. An important concept 
in check valves is the cracking pressure which is the minimum differential 
upstream pressure between inlet and outlet at which the valve will operate. 
Typically the check valve is designed for and can therefore be specified for a 
specific cracking pressure. Heart valves are essentially inlet and outlet check 
valves for the heart ventricles, since the ventricles act as pumps. Hot Tags: 
trunnion ball valve, China, suppliers, manufacturers, factory, Lug Triple Offset 
Butterfly Valve, Cryogenic Ball Valve, Wafer Type Butterfly Valve, Wafer Double 
Offset Butterfly Valve, EPDM Butterfly Valve, API 609 Triple Offset Butterfly 
Valve FAQ Q: How can I get the sample? A: We provide free sample for your 
evaluation. We need to know the specification of the yarn you need. Standard 
sample will be free, but you may pay the delivery cost. Q: Are you a trader or 
manufacturer ? A: We are a manufacturer, we have the whole product line.Check 
Valve factory website:http://www.biyi-valves.com/check-valve/