The CHFS series cut-off valve is a self-operated emergency safety shut-off valve and serves as a critical safety protection device in gas transmission and distribution systems. It features optional ultra-high (or ultra-low) pressure cut-off functionality, enabling it to rapidly interrupt gas flow when system pressure reaches the preset warning threshold, thereby safeguarding downstream systems. It is especially suitable for medium-to-high pressure applications.

Technical Specifications

Maximum allowable inlet pressure  P_{e, max}: ≤ 100 bar

Inlet pressure range  b_pe: 0.1–100 bar

Cut-off pressure range  W_h: 0.1–80 bar (40 bar)

Cut-off accuracy class  AQ: ≤ 2.5

Response time  t_a: ≤ 1 sec

Operating temperature  −20 °C to 60 °C

Flow coefficient  C_g: ≤ 18300

Connection size (flange)  DN50~DN150 (PN40 or Class 600)