Diaphragm Valves

Diaphragm Valve

What is a Diaphragm Valve

Diaphragm Valve is glandless valve that consist of a valve body, a flexible elastomeric diaphragm, and a seat (Weir/Saddle) upon which the diaphragm closes the valve. Diaphragm Valve is designed for leak-proof control of abrasive and corrosive liquids, suspensions, slurries, and pulps.

Diaphragm Valve - Tru Tech ValveIn addition, diaphragm valves provide an external seal, therefore all moving parts are fully isolated from the wetted parts and the media being conveyed. These valves are ideal for applications that require tight shut-off, accurate closure and is effective in gas, liquid, suspended solids and slurry applications. Diaphragm valve is also ideal for acidic, corrosive and abrasive applications with the proper materials and linings.

Diaphragm valves are typically available in two configurations, straight-thru Valve and weir type.

Straight-Thru Diaphragm Valve

This type of diaphragm valve is also often referred to as full bore diaphragm valve. In this design, the diaphragm seals over a seat. Due to their unique design, these valves provide full flow capability with minimum pressure drop. These valves are typically applied for on-off service. Tru-Tech’s straight-thru diaphragm valve is available in two configurations, namely Tru-Flow compatible with MSS-SP88 and Maxi-Flow compatible with ANSI B16.10.

Enhanced Weir Type

In this type of diaphragm valve, the diaphragm seals against a Weir or Saddle. These valves are typically applied in throttling control applications. The TruTech enhanced weir valve is designed to minimize pressure drop and provide laminar flow characteristics of Straight Through valves.

Diaphragm Valves

Advantages

  • Designed for higher operating pressures than the competition (125 to 200 PSIG)
  • Compact design (Tru-Flow and Tru-Trol) conforming to conform to ASME/ANSI B16.10. interchangeable with most solid wedge, double disc, and resilient wedge gate valves as well as short pattern plug and ball valves.
  • Compact design (Maxi-Flow and Maxi-Trol) conforming to conform to MSS SP-88, fully interchangeable with most diaphragm valves in the market
  • Ductile Iron construction, as opposed to cast iron, reduces damage from wear and tear and improves long-term reliability.
  • Tru-Tech Valve body and Duo-Flex diaphragm are designed to provide streamlined laminar flow profiles of a Venturi with minimal change in incremental cross sectional area, resulting in minimum pressure drop
  • Unique body design results in shorter stroke, reducing diaphragm stress and providing longer life
  • By design, Tru-Tech Valves deliver zero fugitive emissions. Additionally, sealed bonnet is also available as an option
  • The Duo-Flex diaphragm can easily be replaced in line. The straight through design also facilitates the use of brushes or rods to clean the valve.
  • Double-studded diaphragm, v/s single-studded, deliver better seal and longer life
  • Standard TGIC Polyester powder coating
  • Standard Rising Stem, Travel Stop Nut, and Stem Cover for Manual Valves
  • Standard Adjustable Travel Stops on all Pneumatic Actuated Valves
  • Standard Adjustable Closing Stops on all Pneumatic Operated Valves
  • Wide range of valve body materials, coatings/linings and diaphragm material (See link below for full listing)

Valve Target Markets:

Valves PDF:

Valve Parts:

No.Description
1Body
2Bonnet
3Handwheel
4Handwheel Key
5Indicator Rod
6Bushing Cap
8Thrust Washer
9Shaft
11Wiper Ring
13Pipe Plug
14Thrush Bearing
15Bushing
16Compressor
17Compressor Pin
19Diaphragm
20Diaphragm Nuts
22Bonnet Bolts
23Bonnet Nuts
28Grease Fitting

Diaphragm Options

Diaphragm options - TruTech Valve

Diaphragm valve is the ideal solution for applications in conveying corrosive, abrasive media, or media containing solids in suspension or in High-purity applications. Depending on the media, various body, body lining and diaphragm material options are available for chemical compatibility. The moving parts of a diaphragm valve are isolated from the media being conveyed resulting in durability and isolation. Further, diaphragm valve can be maintained in-line making them easy to maintain.

 

Diaphragm Valve Technical Data

Actuators:

Tru-Tech’s Diaphragm Valves are designed to work with all makes and models of actuators in the market.

 

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