Sanitary Hygienic Zero Dead Leg 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. This construction eliminates moving stem seals, complies with ASME BPE self-draining mandates, and provides sterile shutoff during Clean-in-Place (CIP) and Steam-in-Place (SIP) thermal routines.
Pneumatic Piston Thrust and Dynamic Line Pressure Differential
Automated line control requires exact coordination between air supply pressure and internal media resistance. Deploying a stainless steel pneumatic hygienic diaphragm valve maintains positive shutoff without over-compressing polymer seals:
| Actuator Piston Diameter | Control Air Pressure | Maximum Line Working Pressure | Spring Return Mode |
|---|---|---|---|
| 50 mm Cylinder | 4.5 to 6.0 bar | 6.0 bar Differential | Normally Closed (Fail-Safe) |
| 80 mm Cylinder | 5.0 to 6.5 bar | 8.5 bar Differential | Normally Closed (Fail-Safe) |
| 100 mm Cylinder | 5.5 to 7.0 bar | 10.0 bar Differential | Double Acting (Air-to-Air) |
Balanced pneumatic springs generate continuous downward seating thrust across thousands of operational cycles. This mechanical stability prevents seat distortion during pressurized steam surges, extending diaphragm operating periods across continuous distribution lines.
Point-of-Use Stagnation Control and Branch Manifolds
Secondary branch take-offs require minimal fluid entrapment between process headers and distribution points. Welded into recirculation loops, a zero dead leg diaphragm valve restricts stagnant fluid pockets below ASME BPE hold-up limits.
Forged 316L block bodies eliminate interstitial cavity seams between the main header run and the valve seat. Smooth interior passages reduce localized turbulence and preserve high flow velocities across pure media circuits.
Tank Bottom Evacuation and Unobstructed Vessel Clearing
Formulation vessels and sterile storage tanks require unobstructed gravity evacuation during batch drain cycles. Bolted or welded directly against tank dished heads, a tank bottom diaphragm valve mounts flush with the vessel base profile.
This alignment prevents fluid hold-up along lower container contours, guaranteeing rapid product recovery and full chemical clearance throughout cleaning stages.
Internal Micro-Finish and Gravitational Drainage Alignment
Internal wet surfaces undergo electropolishing to reach surface finishes under 0.4 micrometers Ra. This smooth finish prevents bacterial film development and accelerates CIP chemical rinse stages.
Installing weir bodies at an inclined angle between 15 and 30 degrees promotes gravity clearing along process piping, securing sterile boundary integrity across demanding pharmaceutical operations.
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. |
