Verified Supplier | Zhejiang Dafulong Valve Co., Ltd.
Zhejiang Dafulong Valve Co., Ltd.

China Manufacturer with main products: Teflon Lined Valves, Lining Valves, Butterfly Valve, Ball Valve

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Teflon Lined Diaphragm Valve

FOB Price: 10.00 USD/Piece
Supply Ability: 100 Piece/Pieces per Week
Shipping: according to the situation
Payment Terms: L/C, T/T(Bank Transfer), 00
Update Time: 2011/4/28
In Stock
Place of Origin: Zhejiang in China
Packaging Details: plywood

Specifications

The Lined Diaphragm valve is a speical blobe valve with shut-off.Its open-close accessory is made of steel petal and soft material,valve inner cavity and cavity of cover ater seperated to cut-off the medium in the pipe.

Basic series are G41F46 weir type and G45F46 diaphragm valve.The characteristic are as follows.
 
1 Complex septum separate the lumen under part and cavity of cover.It will separate the pole of valve.Petal of valve and medium,the packing stuff are omitted.The inner leage and outer leakage are avoided simuitaneously.
 
2.The diaphragm made by fluoroplatic lined FEP and synthetic rubber and the valve with fluoroplastic liner are applied to all kinds of serious erosive medium except "fuse alkali metal and F element.
 
3.The diaphragm regard as executing element is easy cracked because of frequent start and close.Sothat it must be exchaged regularly.
 
4.the erosion-proof performance of fluoroplastic lined and usage temperature recommended is placed in "the fluoroplastic lined used by the valve and pipe accessory.

Casting Material Specifications :-
  • Cast Iron : IS 210, G.R.F. G. 200
  • Ductile Iron: ASTM A395
  • Cast Steel : ASTM A216, G.R. WCB
  • S. S. 304  : ASTM A351 CF8
  • S. S. 304L: ASTM A351 CF3
  • S. S. 316: ASTM A351 CF8M
  • S. S. 316L : ASTM A351 CF3M
  • Alloy 20 : ASTM A351 CN7M
1. Suitable Temperatures: ≤150
2. Type of operation: Lever, Worm Gear, Pneumatic, Electric.
Materials:
Body: Cast Iron, Carbon Steel, and Stainless Steel
Disc: Cast Iron, Ductile Iron, Carbon Steel, and Stainless Steel, Fluorine Covered Cast Steel
Stem: 1cr13 Carbon Steel, Stainless Steel
Seat: PTFE, FEP, PFA
Ball Check Valves

Construction of Material :-
Casting Material Specifications :-
  • Cast Iron : IS 210, G.R.F. G. 200
  • Ductile Iron: ASTM A395
  • Cast Steel : ASTM A216, G.R. WCB
  • S. S. 304  : ASTM A351 CF8
  • S. S. 304L: ASTM A351 CF3
  • S. S. 316: ASTM A351 CF8M
  • S. S. 316L : ASTM A351 CF3M
  • Alloy 20 : ASTM A351 CN7M
Design Standard :-
  • BS 5351, Short Pattern / As per manufacturer std.
Standard Resin Specifications :-
  • PFA:  ASTM D 3418
  • FEP :   ASTM D 2116
Service Temperature : -
PFA :-
  • Maximum continuous service temperature:   265° C
  • Melt point :   305° C
FEP :-
  • Maximum continuous service temperature : 200° C
  • Melt point :   260° C
Lining Thickness : -
  • Minimum Lining thickness would be 3.0 mm over all wetted portion.
Chemical Inertness :-
  • PFA / FEP is chemically inert to most of the all chemicals and solvents with the exception of molten alkali metals.
  • PFA / FEP lined valves are used to convey, and are inert to, these chemicals : All acids including hydrofluoric, sulphuric and aqua regia, all caustic, all chlorides  organic and inorganic, all solvents, all bleach solutions, all peroxides, all phenols and any combinations of above materials.
  • Combined with the chemical inertness of PFA / FEP is its unique non-stick property. Thus a PFA / FEP lined products eliminate or minimize the built up of deposits of the products which otherwise reduce flow and affect processing operations.     
PFA / FEP Lined Ball Check Valves Finish :-
  • The interior surface of all valves are clean and free of mold burrs, rust, scale or others that may adversely affect the performance of lining.
  • The exterior surface of all valve bodies are be cleaned by sand / shot blasting and painted by 1 coat of Epoxy primer and 2 coats of Polyurethane Top coat.

Products Inspection and Testing :-

Hydrostatic Pressure :-
  • Body Test   : 10 Kg/Cm2
  • Seat Test    : 10 Kg/Cm2
  • (Hydrostatic pressure at room temperature using clean water.)

Electrostatic Pressure :-
  • Non-destructive high-voltage test at an output voltage of 10,000 V. When electric contact is made, a visible/ audible spark or both occur at the probe if there is any defect in lining.
Visual Inspection :-
  • All surfaces are free from blister, porosity or any other defect. All checks / tests are conducted before shipment.
Storage & Transport :-
  • Each end of valve is protected by specially made rubber cap so that products are capable to withstand normal handling during transport.
  •  All the materials are supplied with export wooden case or card box packing depending upon the weight and mode of shipment.

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