Rubber Diaphragm

  • DIAPHRAGM MATERIAL: 
  • 1 EPDM 
  • 2 NBR 
  • 3 SILICONE 
  • 4 PTFE 
  • 5 VITON®.
  • 6 POLYURETHENE
  • 7 NEOPRENE 

  • Diaphragm Features : 

  • Positive Seal 
  • diffrent grade of fabric 
  • Low Spring Rate 
  • No Lubrication 
  • No Breakaway Force 
  • No Friction 
  • High Strength 
  • Functionality Over Wide Pressure Ranges 
  • Competitive 
  • Easy Design 

DESCRIPTION:


WESPODIA

FABRIC REINFORCED RUBBER DIAPHRAGM ARE OUR EXPERTISE FROM LAST 30 PLUS YEARS.

WE ARE MANUFACTURERS AND EXPORTERS OF RUBBER DIAPHRAGMS IN NATURAL AND SYNTHETIC RUBBER WITH OR WITHOUT FABRICS REINFORCED AND METAL ,PLASTIC , CARBON OR PTFE BONDED WITH MATCHING METHODOLOGY.



 

 

APPLICATION 

TYPICAL APPLICATIONS FOR WESPO DIAPHRAGMS (LIKE PUMPS AND VALVES) ARE IN PROCESS CONTROL, WATER MANAGEMENT, FOOD AND BEVERAGES PROCESSING, GAS REGULATORS, AND OTHER INDUSTRIAL SYSTEMS.

WESPO DIAPHRAGMS ARE CURRENTLY FOUND IN AEROSPACE, INDUSTRIAL, ELECTRONIC, AGRICULTURAL, CHEMICAL AND MEDICAL PRODUCTS

WESPO DIAPHRAGM RANGE:

WESPO RANGE OF DIAPHRAGMS INCLUDE PLAIN, CONCAVE, CONVEX, SAUNDER’S TYPE,CUP TYPE, HAT TYPE & SAUCER TYPE, WITH OR WITHOUT FABRIC REINFORCEMENT.




HOW TO IDENTIFY THE RIGHT ELASTOMERS FOR WESPO DIAPHRAGM 

DIAPHRAGM IS MADE OF DIFFERENT ELASTOMERS, EACH DESIGNED TO PERFORM BEST UNDER CERTAIN CONDITIONS. THERE ARE THREE PRIMARY DATA POINTS YOU NEED TO IDENTIFY IN ORDER TO DETERMINE WHICH ELASTOMER TO SELECT FOR A GIVEN APPLICATION:

1  OPERATING TEMPERATURE
2  LEVEL OF POTENTIAL CORROSION
3  LEVEL OF POTENTIAL WEAR

FOLLOWING FACTORS ARE IMPORTANT TO CHOOSE RIGHT FABRIC 

1  DIAPHRAGM STROKE RATE EFFECT
2  RISK OF TEARING OF THE FABRIC DUE  TO FLANGE SEALING CONDITIONS
3  REQUIRED BALANCE BETWEEN SENSITIVITY AND STRENGTH OF THE FABRIC
4  ENVIRONMENTAL EFFECTS ON THE FABRIC, I.E. FLAMMABILITY AND TEMPERATURE

TYPES OF DIAPHRAGMS:

VALVE DIAPHRAGM
PUMP DIAPHRAGM
ACTUATOR DIAPHRAGMS



 

WESPO SAUNDERS RUBBER AND PTFE DIAPHRAGM SIZE RANGE

XE AND XB A TYPE: DN008 – DN350
XC A TYPE: DN015 – DN350
XF A TYPE: DN65
KB TYPE: DN015- DN350

WESPO FLAT RUBBER DIAPHRAGM 

FLAT RUBBER DIAPHRAGMS ARE MOULDED FROM TOOLS OR CUT FROM FABRIC REINFORCED SHEET WESPO FLAT DIAPHRAGM ARE  PRESSURE LOADABLE ON BOTH SIDES. THEY HAVE SAME EFFECTIVE AREA ON BOTH SIDES. THE FLAT RUBBER DIAPHRAGMS ARE USED FOR PUMPS, REGULATION, CONTROL AND MEASUREMENT



 

 

 

 


WHY CHOOSE WESPO RUBBER DIAPHRAGMS ? 

1. ONE-STOP SERVICE FROM COMPOUND TO MANUFACTURE
2. IN-HOUSE WEL EQUIPPED MOLD DESIGN AND BUILDING CAPABILITIES
3. RUBBER COMPOUND TESTED BEFORE PRODUCTION
4. RUBBER COMPOUND CAN BE ROHS, REACH, FDA APPROVED. OTHER CERTIFICATES CAN BE DONE ACCORDING TO DIFFERENT CUSTOMER'S DEMANDS
5. KEEP SECRET TO YOUR IDEA AND YOUR DESIGN.
6. PROFESSIONAL DESIGN TEAM, MOLD MAKER ENGINEER. OEM/ODM SERVICE.
7. PROMPT DELIVERY. FOR PROTOTYPE: 3- 10 DAYS, PRODUCTION ORDERS CAN BE ARRANGED SPECIALLY TO MEET CUSTOMER’S URGENT DEMANDS
8. PROFESSIONAL QC AND R&D TEAMS TO ASSURE HIGH QUALITY ALL DIAPHRAGM DULY MARKED WITH MFG DATE AND YEAR

WESPO STUDY DIAPHRAGM PERFORMANCE IN THREE IMPORTANT WAYS.

1) SHORT-TERM, ROOM TEMPERATURE BURST TESTING :-

WE STUDY THE BURST PRESSURE OVER SEVERAL ORIFICE SIZES TO DETERMINE THE STRENGTH OF THE MATERIAL AND PROJECT THE BURST PRESSURE IN COMMERCIAL REGULATORS

2) TEMPERATURE DE-RATING BURST TESTING :-

WE STUDY THE DEGRADATION OF BURST STRENGTH OF THE MATERIAL AT VARIOUS ELEVATED TEMPERATURES TO ROUGHLY ESTIMATE A TEMPERATURE DERATING FACTOR. OUR INTERNAL DATA IS COMPARED WITH PUBLISHED DATA WHERE AVAILABLE.

3) PERFORMANCE TESTING :-

WE RUN PERFORMANCE TRIALS WITH VARIOUS DIAPHRAGM MATERIALS TO KNOW WHERE BEST TO APPLY THEM. THIS INCLUDES DETERMINING THE LOWEST FLOW ACHIEVABLE WITH ANY PARTICULAR MATERIAL.

WE HAVE SPARE DIAPHRAGM QUALITY SIMILAR TO BELLOW OE VALVE MANUFACTURER :

1   SAMSON CONTROL
2. GHATGE PATIL INDUSTRIES LTD
3. VALVE WORKS USA
4. FORBES MARSHALL
5. HORA VALVES
6. TECHNIC VALVES PVT LTD
7. JOHN CRANE VALVE
8. FISHER VALVE


Wespo Rolling rubber diaphragms

are special diaphragms shaped like top hats which provide the properties both of bellows and diaphragms. 

The rolling diaphragms have deep folding parts, which allow smooth rolling action. 
A long stroke is possible, and the effective pressure receiving area will be maintained the same throughout the operation.

Because the Rolling Rubber Diaphragm will move with a rolling action, it will not be necessary to pay special attention to the surface finish, materials, and hardness of the piston and the cylinder. 

In addition, these rolling rubber diaphragms can respond to minute pressure variations, greatly contributing to improving the performance of equipment in the air pressure and liquid pressure control fields. 

The design of the rolling rubber diaphragms enables their use without any lubrication. The rolling action of this type of diaphragms allows no friction loss in addition to extremely small hysteresis loss. 

When using rolling rubber diaphragms there is no leakage(very low levels to be exact, however, there will be a tiny permeation through the rubber membrane.). The effective pressure receiving area will constantly stay the same throughout the full stroke. 

Because the folding parts of the Rolling Rubber Diaphragms are narrow, they can be designed for extremely low pressure (250Pa) applications to high pressure (9.81MPa) applications.

The Rolling Rubber Diaphragms have a long lifetime due to the rolling action. Rolling Rubber Diaphragms has a design with an automatic centripetal action. (If the piston is pushed in one particular direction, the pressure will cause a restoring force that will act to return the piston to the center line.)









Wespo Diaphragms Without fabric


In very low-pressure applications, the strength seen in fabric reinforced diaphragm may not be necessary. For these special applications, Western offers diaphragms made with a only rubber  construction. These diaphragms offer the same functional advantages seen in fabric reinforced diaphragms, but they have the added economy of using the Special construction is possible using all types of elastomers as per technical specifications


Wespo food grade diaphragm




 

 



 

 

 



 

PIC OF UNFINISHED EPDM DIAPHRAGM WITH NYLON FABRIC

 



 

MAIN CAUSES OF FAILURE OF DIAPHRAGM 



 

OVER LAPPING OF FABRIC IS MAIN CAUSES OF DIAPHRAGM FAILURE 



TO AVOID OVER LAPPING, FIRST WE MOULD FABRIC TO GET REQUIRED DIAPHRAGM SHAPE (WHICH WILL BE WITHOUT ANY WRINKLES )THEN WE BOND WITH RUBBER IN MOULD AND HEAT TO GET REQUIRED DIAPHRAGM 



 

 



 

 

 

 

 

1)  DOWNLOAD WESPO PRODUCT CATALOGUE

2) DOWNLOAD WESPO DIAPHRAGM CATALOGUE

3) DOWNLOAD RUBBER COMPARISON CHART

4 ) DOWNLOAD TYPES OF RUBBER AND TRADE NAMES