Sanitary Hygienic Tri Clamp Zero Dead Leg 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.
Sanitary Clamp Assembly and Gasket Boundary Alignment
Rapid line dismantling during scheduled inspection sequences requires precise connection geometry. Installing a tri clamp diaphragm valve permits rapid disassembly while avoiding mechanical flange distortion.
Matching ferrule profiles compress elastomeric gaskets without intrusion into the process stream. Internal flow surfaces maintain an electropolished finish below 0.4 micrometers Ra, eliminating microscopic crevices that could harbor biofilm colonies across transfer lines.
Stainless Steel Passivation and Surface Finish Treatments
Forged 316L stainless steel bodies undergo post-machining passivation to restore the protective chromium oxide film against pitting corrosion:
| Surface Treatment Process | Chemical Agent Applied | Minimum Chromium-Iron Ratio | Corrosion Resistance Level |
|---|---|---|---|
| Nitric Acid Passivation | ASTM A967 Nitric 2 | 1.3 Cr/Fe | Resistant to dilute mineral acids |
| Citric Acid Passivation | ASTM A967 Citric 4 | 1.5 Cr/Fe | High resistance to organic sanitizers |
| Chemical Electropolishing | Phosphoric / Sulfuric bath | 2.0 Cr/Fe | Superior resistance to pure steam etching |
Removing free iron atoms from fluid contact zones creates an impervious passive layer. This chemical barrier prevents ion leaching into high-purity injectable solutions and stops discoloration under repetitive high-temperature wash sequences.
Loop Stagnation Control and Branch Line Elimination
Recirculation loops and point-of-use drop lines require minimal hold-up volumes. Integrating a forged zero dead leg diaphragm valve directly onto distribution loops restricts fluid retention within strict ASME BPE dimensional limits.
Contoured flow channels sustain internal stream velocity, eliminating unwashed pockets and accelerating rinse cycles during fluid product changeovers.
Gravitational Drainage Alignment and Aseptic Flow Regulation
Gravity-assisted pipe evacuation prevents pooling along horizontal process runs. Aligning a hygienic diaphragm valve at an inclined angle between 15 and 30 degrees ensures uninhibited fluid evacuation across horizontal pipe sections.
Precision weir profiling supports sterile boundary maintenance between batch cycles and preserves product integrity across rigorous high-purity production 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. |
