Special Valves

Rubber,PTFE,PFA,F46 Lined Diaphragm Valve

Rubber,PTFE,PFA,F46 lined Diaphragm Valve have two types : weir (saddle) type and "straight-way" type .The weir type diaphragm valve has its two ports in line with each other on the opposite sides of the valve, whereas the weir type has the in/out ports located at a 90 degree angle from one another. The weir type is the most common in process applications and more commonly used as a tank bottom valve.

Rubber,PTFE,PFA,F46 lined Diaphragm Valve


  1. Rubber&PTFE lined diaphragm valve is ideally suited for shut-off, flow control and throttling of corrosive process media in either liquid or gaseous state. Its main features are heavy-duty, robust construction, maintenance-free, easy replacement of components on site. Convenient, flexible and accurate open or close.
  2. It can sustain any corrosive medium in addition to the molten alkali metals and fluorine elements. It is ideal products used in chlor-alkali, industrial in organic chemicals, metal and mining, nitrogen and phosphatic fertilizers, petroleum refining, pharmaceutical etc.
  3. It is not applicable for diaphragm used in medium with hard particles, which will cause diaphragm damage and leakage.
  4. The working temperature cannot exceed the specified range.
  5. Open the diaphragm too frequent will influence the sealing performance.
  6. Lining material:NR,EPDM,PFA,PTFE,F46 etc.
  7. Operation methods:manual,electric, pneumatic.
  8. TANA lined diaphragm valves are available as per the needs of applications in additional sizes and other than standard materials.

We offer lining materials like NR,EPDM,PFA,PTFE,F46 etc.




PTFE : ≤120°C

PFA: ≤120°C

Lining Thickness:Min. 3.0mm


Body Material:Cast Iron,Ductile Iron, A216/WCB, A351/CF8,A351/CF8M,A351/CF3,A351/CF3M,LCB,

Lining Material:NR,EPDM,PFA,PTFE,F46 etc.

Diaphragm Part:NR,EPDM,PFA,PTFE,F46 etc.

Nominal Diameter: NPS 1/2"-16" DN15-400

Pressure Range: 0.6Mpa ,1.0Mpa,1.6Mpa,class150

Connection Type: Thread,Flange

Operation Method:manual,electric, pneumatic.

Suitable:≤85℃、≤100℃、 ≤120℃、≤150℃

The materials of main parts

No. Part Cast iron Cast steel Stainless steel
1 Body/Bonnet HT250 WCB CF8 CF8M CF3 CF3M
2 disc/stem 35 1Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti 00cr18Ni10 00Cr17Ni14Mo2
3 lined/seat PTFE(F4),FEP(F46),PFA
4 diagram FEP(F46),PFA,EPDM
5 yoke WCB CF8 CF8
6 Stem nut ZCuAI10Fe3 ZCuAI10Fe3 ZCuAI10Fe3
7 bolt 35 1Cr17Ni2 1Cr18Ni9Ti
8 nut 45 0Cr18Ni9 0Cr18Ni9
9 handwheel WCB WCB WCB

Main external and connection dimensions(mm)

Rubber,PTFE,PFA,F46 Lined Diaphragm ValveRubber,PTFE,PFA,F46 Lined Diaphragm Valve

Rubber,PTFE,PFA,F46 Lined Diaphragm Valve

Rubber,PTFE,PFA,F46 Lined Diaphragm ValveRubber,PTFE,PFA,F46 Lined Diaphragm Valve

Rubber,PTFE,PFA,F46 Lined Diaphragm Valve

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