Swagelok® offers a broad line of adjustable and fixed cracking pressure check valves to control back flow in general-service and high-purity applications.
Are designed to allow fluids to flow in one direction only
Are rated for use in medium- and high-pressure applications
Spring and Poppet Check Valves (C, CA, CH, CP, and CPA Series)
Spring-and-poppet check valves are available with nominal cracking pressures ranging from 1/3 to 600 psi (0.03 to 41.4 bar) in 316 stainless steel and brass and with end connections 1/8 to 1 in. and 6 to 25 mm in size.
Up to 6000 psig (413 bar)
–50 to 400°F (–45 to 204°C)
Nominal Cracking Pressure
1/3 to 25 psi (0.02 to 1.7 bar)
3 to 600 psi (0.21 to 41.4 bar)
316 stainless steel, brass
Fluorocarbon FKM, Buna N
0.10 to 4.7
Swagelok tube fittings, NPT, ISO, SAE/MS, VCO® O-ring fittings, VCR® face seal fittings
1/8 to 1 in.; 6 to 25 mm
Check Valves (IPT Series)
Ball-seal poppet, soft-seal poppet or dual-seal ball check valves are available with working pressures up to 60 000 psig (4134 bar) and a nominal cracking pressure of 15 psi (1.0 bar) in 316 stainless steel with end connections 1/4 to 1 in. in size. These valves are available for sour gas applications with materials selected in accordance with NACE MR0175/ISO15156.
Up to 60 000 psig (4134 bar)
Up to 650°F (343°C)
Nominal Cracking Pressure
15 psi (1.0 bar), optional pressures available
316 stainless steel
Ball-seal poppet – metal-to-metal seat
Soft-seal poppet – O-ring seat, standard material is HNBR
Dual-seal ball – glass-filled PTFE seat, backed by metal-to-metal sealing
Swagelok medium-pressure tube fittings (soft-seal and ball-seal only), female NPT, cone and thread
1/4 to 3/4 in. (medium-pressure tube fitting); 1/8 to 1 in. (female NPT), 1/4 to 1 in. (cone and thread)
Lift Check Valves (50 Series)
Lift check valves limit reverse flow - forward flow lifts the poppet, opening the valve. Reverse flow seats the poppet against the orifice, closing the valve. The lift check valve is gravity assisted and must be mounted horizontally, with bonnet nut on top.
"Safe Product Selection: The complete catalog contents must be reviewed to ensure that the system designer and user make a safe product selection. When selecting products, the total system design must be considered to ensure safe, trouble-free performance. Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user.
Caution: Do not mix or interchange product components with those of other manufacturers."