2/2-way Diaphragm Valve, cast valve body, weld end and clamp connec-tion, port connection DN 4-50
burkert2031隔膜閥 A 8.0 EAVA
Type 8697 Type 8640/8644
Electrical Valve block
position feedback
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 realized.
Applications
Water treatment
Biotechnology
Food industry
| 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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