burkert2031A G1/4 S/N3845 W31MS帶有不銹鋼外殼電磁閥 寶德2031現場控制的隔膜閥，帶有氣動的活塞驅動裝置和由冷變形不銹鋼管構成的閥體。
burkert2031A G1/4 S/N3845 W31MS
Type 8697 Type 8640/8644
The externally piloted diaphragm valve consists of a pneumatically operated piston actuator, a diaphragm and a 2-way valve housing made of investment cast stainless steel.
The standard material of the actuator is PPS. With its favourable fl ow characteristics and zero dead volume, the valve housing enables high flow capacities and a variety of applica-tions to be realize
| Port Connection | DN 4-50 |
| Body material | Cast stainless steel 316 L/1.4435 |
| Actuator material | PPS (PA polyamide on request) |
| Pilot air ports | Stainless steel 1.4305 |
| Diaphragm materials | EPDM (AB), PTFE/EPDM (EA) |
| EPDM (AD), advanced PTFE/EPDM (EU) and FKM (FF) | |
| on request | |
| Medium | Neutral gases and liquids, high purity, sterile, aggressive |
| or abrasive fl uids | |
| Viscosity | up to viscous |
| Surface finish | (average surface fi nish) |
| internal mechanical polished | Ra ≤ 0.8 μm |
| (external cast surface) | |
| internal electro polished | Ra ≤ 0.6 μm |
| (external cast surface electro | |
| polished) (more on request) | |
| Media temperature | |
| EPDM (AB), PTFE/EPDM (EA) | -10 to +130 °C (steam sterilisation +140 °C for 60 min) |
| EPDM (AD), advanced PTFE/ | -5 to +143 °C (steam sterilisation +150 °C for 60 min) |
| EPDM (EU) | |
| FKM (FF) | 0 to +130 °C (not recommended for steam) |
| Ambient temperature | |
| Actuator size < 100 | +5 to +140 °C |
| Actuator size ≥ 100 | +5 to +90 °C Briefl y up to +140 °C |
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