Non-Slam Check Valves close without slamming the body of the valves. There are different material grades used and different dimensions available to these valves. The valve has a body and a disc that has a spring against the opening pressure of the liquid inside it which allows the no slam check valves to operate without slamming while opening and closing the pipeline. These valves are useful in vertically running pipelines as they are prone to slamming when the direction of flow is downwards. The applications of the different types of valves such as the non slam axial check valve include gas and liquid pipelines, product tank farms, mine dewatering, water treatment, cryogenic applications, cooling towers, gas export facilities and many others.
Stainless Steel Non Slam Check Valve
ASTM A351 CF8M Non Slam Wafer Check Valve
A217 Gr. WC9 Nozzle Type Non Slam Check Valve
The temperatures and pressures for operations are specified by the different standards according to ASME, ANSI and other international standards. The sizes and dimensions of the axial flow non slam check valve vary from ½ inches through 24 inches and above depending on the customer requirements. These valves are made up of different material grades catering to the needs for corrosion resistance, strength and pressure capacities. The non slam spring assisted check valve has a spring in the disc that allows the valve to open and close against the pressure of the pipeline without slamming. The pressure numbers of the valves range from PN10 through PN16 and higher. The smaller sized valves have high pressure capacities than the larger non slamming valves.
Size | 50NB — 600NB |
---|---|
Pressure | 150PS1 |
Temperature | 0 Deg C - 1200 Deg C. |
Body , Chest | Solid One piece casting of Cast Iron Fg 260, Cast Steel Gr WCB ,CF8,CF8M. |
Seat | Integral to Body, Soft, Optional. |
Gate | AISI SS 304,316,316L,317,317L |
Screw Spindle | AISI SS 410,304,316. |
Nut | Brass |
Yoke | Plate type of MS . |
Gland Follower | Cast Iron , Cast steel , Ductile Iron ,CF8,CF8M. |
Hand Wheel | Cast Iron , Cast steel , Ductile Iron |
Gland Packing | PTFE , PTFE Impregnated |
Ends | Lugged |
Port | STANDARD [Round], Optional V Port, Diamond Port,. |
Hydro - test Pressure | BODY : 854 Psig (60 Kg/Cm ²) SEAT : 569 Psig (40 Kg/Cm ²) |
Industry Standards* | |
---|---|
API 594 | Valve Design |
API 598 | Valve Pressure Testing & Inspection |
ASME B16.5 & B16.47 | Flanges |
ASME B16.34 | Pressure / Temperature Ratings |
API 6D | Pipeline Valves |
API 6A | Production Valves |
(PED) 97/23/EC | Pressure Equipment Directive |
Part |
Material |
Standard |
Body |
Ductile Iron |
EN 1563/DIN 1693 |
Bonnet |
Ductile Iron |
EN 1563/DIN 1693 |
Trim |
Stainless Steel 431 |
EN10088-1/ASTM A959 |
Seat |
Stainless Steel 431 |
EN10088-1/ASTM A959 |
Diaphragm |
EPDM / NBR |
ISO 4633 |
Pilot Valve |
Stainless Steel 431 |
EN10088-1/ASTM A959 |
For the materials options not listed, consult factory. ZECO manufactures valves in more than 50 different alloys. |
Pressure Rating | 10bar ~ 25bar |
MATERIAL |
Cast Iron Ductile Iron Cast Carbon Steel, etc. |
Temperature Range | -45°C to 204°C/-50°F to 400°F |
Cast Steel Non Slam Axial Check Valve
Stainless Steel Non Slam Spring Assisted Check Valve
Carbon Steel Dft Non Slam Check Valve
Super Duplex Hydraulic Non-slam Check Valve
316 Stainless Steel Non Slam Wafer Check Valve
A217 Gr. WC9 Swing Type Non Slam Check Valve
Temperature | Up to 600°C |
Size | 4" to 60" |
Rating | 150# to 1500# |
Pressure classes: | PN 10 - 160, ANSI Class 125 - 900 |
Sizes: | DN 50 - 1600 |
Temperature Range | -45°C to 204°C/-50°F to 400°F |
Size Range | 2” – 12” |