658 15D 8405M12T1 1502

Diaphragm valve, pneumatic

Item number: 88886036
Description
Type 658 Diaphragm valve, pneumatically operated, stainless steel two stage actuator
DN 15 DN 15
Body configuration D 2/2-way body
Connection type 8 Flanges EN 1092 / PN16 / form B, Face to face EN 558, series 1, ISO 5752, basic series 1
Valve body material 40 1.4435 (F316L), forged body
Diaphragm material 5M PTFE/EPDM two-piece
Control function 1 Normally closed (NC)
Actuator version 2T1 Operator size 2T1
Execution type 1502 Ra <= 0.8 µm (30 µin.) for media wetted surfaces, according DIN 11866 H3, mechanically polished internal
Surface 1502 Ra ≤ 0.8 μm (30 μin.) for media wetted surfaces, according to DIN 11866 H3, mechanically polished internal
Diaphragm size 25 Diaphragm size 25
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The GEMÜ 658 2/2-way diaphragm valve has a two-stage actuator. In addition to full stroke, a partial stroke can be set via two pistons working independently of each other.All actuator parts including closing springs (except seals) are made from stainless steel. The valve is available with a Normally Closed control function. An opening stroke limiter for setting the partial stroke is integrated as standard.

  • An adjusting screw in the actuator enables the setting of the opening and closing function and also the setting of a partial stroke (for reduced flow)
  • Both fast on/off operation and precision dosing of the working medium possible
  • Suitable for inert, corrosive, liquid and gaseous media
  • CIP/SIP capable
  • Compact design (ideal when space is at a premium)
  • Version according to ATEX on request
  • Mounting of proximity switches (M8x1) for OPEN and CLOSED position feedback possible (MG 25 – 50)