Sanitary Point Of Use Zero Dead Tank Bottom Diaphragm Valve
- Model:
- DFVM2-2-22
- Place of Origin:
- Wenzhou, China
- Packing:
- Suitable Packing for Sea/Air Transport
- Quantity:
- 1000 Piece/Pieces per Month
- Payment:
- T/T, L/C, Western Union
- Material:
- SS316L
- Connection:
- Clamped-Welded
- Gasket:
- EPDM+PTFE
- Shape:
- U Type
A sanitary diaphragm valve isolates process streams from atmospheric exposure using a flexible elastomeric barrier compressed against an internal weir. Threaded stainless steel stems transfer uniform downward thrust without dynamic packing, fulfilling ASME BPE drainability mandates while providing sterile shutoff during Clean-in-Place (CIP) and Steam-in-Place (SIP) routines.
Manual Bonnet Torques and Diaphragm Over-Compression Protection
Manual operation requires mechanical boundary controls to prevent seal shearing during repetitive shutoff sequences. Integrated travel stops limit bonnet spindle advancement, protecting fluoropolymer sealing faces from mechanical deformation:
| Nominal Valve Size | Recommended Closing Torque | Maximum Operating Pressure | Stem Travel Distance |
|---|---|---|---|
| DN 15 (0.50 Inch) | 2.5 to 3.5 Nm | 10 bar Differential | 5.5 mm |
| DN 25 (1.00 Inch) | 5.0 to 7.0 Nm | 10 bar Differential | 9.0 mm |
| DN 50 (2.00 Inch) | 12.0 to 15.0 Nm | 8 bar Differential | 18.0 mm |
Internal thrust ball bearings reduce rotational friction across high-pressure closures. Optical position indicators display open, intermediate, and closed positions, ensuring repeatable fluid regulation across manual isolation cycles.
Cleanroom Sampling Skids and Terminal Point-of-Use Operations
Secondary process branches deliver purified fluids directly to formulation vessels and testing manifolds. Configured as a point of use valve, the assembly delivers precise manual flow throttling without exposing circulating loop headers to outside ambient air.
Polished stainless steel bonnets withstand frequent cleanroom chemical washdowns. The non-rising handwheel configuration maintains a compact vertical profile inside crowded sterile work enclosures.
Loop Stagnation Control and Branch Line Elimination
Recirculation loops demand continuous media movement to prevent bacterial adherence along distribution walls. Machining internal flow paths straight through monolithic forged blocks creates a zero dead valve configuration without dead ends.
This design places the manual weir seat directly adjacent to the main pipeline bore, maintaining high fluid shearing velocities and preventing stagnant water columns.
Vessel Evacuation and Dished Head Alignment
Draining product vessels requires complete bottom clearance across batch changeovers. Positioned along lower container contours, a tank bottom diaphragm valve eliminates internal liquid pockets around outlet ports.
The contoured flange profile welds directly into vessel bases, facilitating rapid product recovery under pure gravity drainage.
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. |
