Check Valves

Series AK/AKH/AKB check valves offer various configurations to provide design solutions based on operating conditions. The series is compact and lightweight with low cracking pressure. The AKH with one-touch fitting, straight type, is easily installed in pipelines, while the male connector type can be mounted directly onto equipment. The bushing type AKB can be used in applications with splashing coolant and spatter, etc.

• Pilot check valve with state detection
• According to ISO 13849
• Positive overlap to ensure the valve has closed completely
• Direct diagnosis with auto switch
• Port sizes: M5, G1/8, G1/4, G3/8, G1/2.

• Pilot check valve, Metal Body Type
• For drop prevention and temporary intermediate stops
• Three female thread / one-touch fitting port combinations
• Body sizes: 1/8, 1/4, 3/8, 1/2
• Applicable tubing O.D.: Ø 6 to Ø 12
• Thread types: G,R, Rc.

The issue of water and air backflow in areas susceptible to corrosion and rust has been resolved with our latest check valves. The INA-14 and XTO-674 Series come in brass or stainless steel body materials with rubber seals of NBR, FKM or CR (Chloroprene rubber). They can be used across a wide range of applications and can cope with extreme conditions, resisting ambient and fluid temperatures as high as 80°C and as low as -30°C. Cost savings are also achieved thanks to a minimum operating pressure of 0.01MPa. Highly flexible, they can be used with both vacuum and oscillation measures and are available in four port sizes, 1/8”, 1/4”, 3/8” and 1/2” and a range of weights from 20g to 280g.

Process Industry and PET machine builder's requests for both 2 and 3 port, pilot operated, solenoid valves, with high pressure performance are now answered with the launch of SMC's latest Series VCH range.Designed for use with air or inert gas, these new valves can operate up to a maximum pressure of 5.0 MPa thereby substantially exceeding SMC's existing VXH high pressure series. With large flow passages, and ISO1179-1 conforming port thread sizes of G1/2 to G1, high flow rates are ensured and due to a reduction in the overall volume of the pilot chamber their responsiveness can now only be measured in milliseconds.Additionally, the VCH range offers enclosure protection equivalent to IP65 and a DIN type electrical connector as standard and due to its unique collision-less armature construction, with rubber buffers and urethane diaphragm, early indications have confirmed that the valves operation life time will exceed 10 million cycles.Currently the VCH Series is available in four different valve configurations; 2 port valve normally closed - VCH41, 2 port valve normally open - VCH 42, our 3 port option - VCH410, plus a check valve - VCHC40.