Check valves NPO ASTA OK133, OK351, OK352, etc.

Check valves are used to protect the pipeline and installed equipment from the backflow of the working medium.
The need to install check valves may arise to protect against the loss of the water column in front of the pumps, in steam systems behind the steam traps, to prevent the steam line from filling with condensate when the steam supply is turned off.

Cast iron check valve ASTA OK113
DN: 15-200
PN: 1.6 MPa
t max°: 250 °C, in short-term mode up to 300 °C
Body material: cast iron
Connection: flanged

• OK113. Technical specifications.

Check valve made of carbon steel ASTA OK133
DN: 15-300
PN: 4 MPa
t max°: 400 °C
Body Material: Carbon steel
Connection: flanged

• OK133. Technical specifications.

Stainless steel check valve ASTA OK143
DN: 15-300
PN: 4 MPa
t max°: 350 °C
Case Material: Stainless steel
Connection: flanged

• OK143. Technical specifications.

Stainless steel check valve ASTA OK351
DN: 15-50
PN: 4 MPa
t max°: 200 °C
Case Material: Stainless steel
Connection: threaded

• OK351. Technical specifications.

The OK352 series check valves are used to protect the pipeline and installed equipment from the backflow of the working medium.
These valves have a number of design advantages, namely: a reinforced structure, a thick-walled housing, as well as a guide, thanks to which the breaking of the disc is excluded, as it periodically occurs in flanged valves, in the design of which a guide is not provided.
DN: 15-300
PN: 2.5 MPa
t max°: 200 °C
Case Material: Stainless steel
Connection: flanged

• OK352. Technical specifications.