Sanitary Aseptic Zero Dead Leg Pou Diaphragm Valve
- Model:
- Place of Origin:
- Wenzhou, China
- Connection:
- Clamped-Welded
- Gasket:
- EPDM+PTFE
- Packing:
- Suitable Packing for Sea/Air Transport
- Quantity:
- 1000 Piece/Pieces per Month
- Payment:
- T/T, L/C, Western Union
- Medium:
- SS316L
- Shape:
- U Type
A sanitary diaphragm valve isolates process streams from operating drive mechanisms through an elastomeric barrier compressed against a raised weir. Monolithic internal flow paths prevent fluid entrapment along internal perimeters, fulfilling ASME BPE drainability mandates while providing sterile shutoff during Clean-in-Place (CIP) and Steam-in-Place (SIP) thermal routines.
Thermal Shock Compensation and Diaphragm Preload Restoration
Exposing sealing assemblies to alternating cycles of saturated steam and ambient cleaning solutions causes dimensional shifts across polymer components:
| Thermal Sterilization Phase | Operating Temperature | Thermal Expansion Differential | Sealing Stress Compensation |
|---|---|---|---|
| Steam-in-Place (SIP) | 121°C to 134°C | Positive expansion (+0.42 mm) | Spring compression absorption |
| Ambient CIP Rinse | 15°C to 25°C | Negative contraction (-0.38 mm) | Elastic spring stroke extension |
| Process Circulation | 2°C to 8°C | Steady thermal baseline | Fixed pre-load boundary tension |
Pneumatic operators maintain consistent seating force across these rapid temperature swings. Controlled spring compression counteracts fluoropolymer creep, preserving positive containment without crushing sealing ridges during extended production campaigns.
Dynamic Pneumatic Actuation and Elastomeric Longevity
High-speed automated processing loops require swift shutoff cycles against line backpressures. Pneumatic actuators engineered for aseptic diaphragm valves utilize balanced internal spring sets to regulate seating thrust across repeated cycles.
This balanced closure action eliminates manual over-tightening risks, minimizes diaphragm wear, and prevents localized material shearing along internal weir boundaries.
Cleanroom Distribution Terminals and Point-of-Use Operations
Secondary process outlets deliver purified media directly to compounding vessels and filling lines. Serving as an isolated pou valve, the compact body geometry delivers immediate fluid release without disturbing circulating supply headers.
Electropolished wet surfaces below 0.38 micrometers Ra prevent biofilm development, while internal contours facilitate fast gravity draining once flow sequences finish.
Recirculation Manifold Geometry and Dead Leg Elimination
Continuous loop circulation prevents particulate settling along distribution mains. Welded directly into processing pipelines, a zero dead leg diaphragm valve integrates the shutoff weir into the pipe run perimeter.
Machining the flow passage directly from solid 316L block stock eliminates stagnation pockets, sustaining high fluid shear velocities and securing sterile boundary compliance across demanding biotech facilities.
Product Description
| Control mode: | Manual Type & Pneumatic Type |
| Size : | 1/2",3/4",1",1.5",2" |
| Operation : | Normal Open & Normal Close design |
| Connection type: | Clamp or Weld or other |
| Connection: | INCH: 1/2"-2", DIN - ISO: DN10-DN50. other size can be requirement. |
| Working temp: | ASSEMBLING Diaphragm:EPDM(-40 C -150 C0 PTFE/EPDM(-10 C-150 C) |
| Working pressure: | 10 Bar |
| Standard : | OD/ID mirror polished. ID Ra<0.8um. OD- Sand Blasted .or E/P or other ,ID C Ra<0.5um(SF1) or E/P Ra0.3um(SF4) can be requirement. |
