burkert 2731-00550435隔膜閥 The diaphragm control valve Type 2731 consists of a pneumatically operated piston actuator, a diaphragm and a valve body made of investment cast stainless steel. burkert 2731-00550435隔膜閥 The actuator has been designed so that the stroke can be continuously changed.  This makes a favourable characteristic possible for the continuous change of the flow.

特點(diǎn)：

1. 適合zui高要求的理想調(diào)節(jié)閥
2. 通過隔膜將介質(zhì)與驅(qū)動裝置嚴(yán)格分離
3. 堅固的通用驅(qū)動裝置，具有模塊化配件系列
4. 帶有連接套頭、壓合接頭或焊接接頭的不銹鋼外殼

參數(shù)：

Materials Body
 Actuator
Cast stainless steel 316L/1.4435
PA polyamide (PPS on request)
Diaphragm materials EPDM (AB), PTFE/EPDM (EA)
EPDM (AD), advanced PTFE/EPDM (EU) and FKM (FF) on
request
Process medium For neutral gases and liquids, high purity, sterile
aggressive or abrasive fl uids
Viscosity Up to viscous
Surface fi nish
 internal mechanical polished
(external cast surface)

On request
 internal electro polished
(external cast surface electro polished)
(average surface fi nish)
Ra ≤ 0.8 μm
Ra ≤ 0.6 μm
Medium temperature
 EPDM (AB), PTFE/EPDM (EA)
 EPDM (AD), advanced PTFE/
EPDM (EU)
 FKM (FF)
-10 to + 130 °C (steam sterilisation +140 °C for 60min)
-5 to +143 °C (steam sterilisation +150 °C for 60min)
0 to +130 °C (not recommended for steam)
Ambient temperature -10 to +60 °C

Control medium
(for coupling with a positioner)
Instrumental air class 3 acc. to DIN ISO 8573-1
Pilot pressure 5.5 to 7 bar with actuator sizes Ø80 to 125 mm
Pilot air ports G1/4 (stainless steel)
Flow characteristic See chart p. 2