Diaphragm Valve

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Diaphragm valve manufacturers in USA

SVR Global manufactures diaphragm valves engineered for water treatment, chemical processing, semiconductor fluid handling, and sterile process systems across the USA. Each valve is designed to deliver bubble tight shutoff and a non contaminating flow path suited to sensitive or corrosive media.

What is a Diaphragm Valve?

A diaphragm valve is an apparatus for controlling the flow of media through the pipe that utilizes the principle of diaphragm opening/closing/controlling the flow. This diaphragm keeps the media away from the valve operation components such as the bonnet, stem, or actuator.

Working Principle of a Diaphragm Valve:

The diaphragm is held firmly on the valve body and can be moved up or down depending on how the actuator or hand wheel operates. If the diaphragm is lowered, it comes into contact with a weir or seating surface, which stops the flow. If the diaphragm is raised, then the flow channel is opened.

Types of Diaphragm Valves :

Cast Iron Diaphragm Valve - Suited for standard water treatment and industrial process lines, offering mechanical strength at a cost efficient body material.

Ductile Iron Diaphragm Valve - Offers greater strength and durability when compared to regular cast iron valves, suitable for higher pressure water and process services.

Electric Actuated Diaphragm Valve - Driven by electric actuators for ease of operation and control by systems.

Pneumatic Actuated Diaphragm Valve - Operated by pneumatic actuators driven by compressed air, ideal for automated process lines.

Diaphragm Valve Body Materials:

Cast Iron and Ductile Iron Bodies

Used for standard water treatment and industrial process applications where cost efficiency and mechanical strength are priorities.

Stainless Steel Bodies

Selected for corrosive media, higher-purity process lines, and applications requiring resistance to a broader range of chemicals.

Lined Plastic and Polypropylene Bodies

Offer chemical resistance for aggressive fluid handling in process lines where metal bodies would corrode over time.

Applications of Diaphragm Valves:

Water and Wastewater Treatment - isolation and control across treatment and distribution processes
Chemical Processing - handling corrosive or aggressive fluid streams
Semiconductor and Ultra Pure Fluid Handling - non contaminating flow control for high-purity process lines
Slurry and Abrasive Media Handling - straight through design supports flow with suspended solids
Biotech and Sterile Process Systems - sanitary configurations for processes requiring frequent cleaning and minimal fluid retention

Manufacturing Standards and Certifications for Diaphragm Valves:

ISO 9001	Quality management system certification indicating consistent manufacturing processes and documented quality control.
MSS SP-88	Covers diaphragm valve design, dimensions, and pressure temperature ratings specific to this valve type.
ASME B16.34	Governs pressure temperature ratings, materials, and dimensional requirements applicable to valve design.
ASME B16.5	Specifies flange dimensions and pressure classes for flanged end diaphragm valves.
API 598	Covers inspection and testing procedures, including seat and shell testing, for valve verification before shipment.
NSF/ANSI 61	Certifies materials in contact with drinking water, applicable to diaphragm valves used in water treatment and distribution systems.
FDACompliant Diaphragm Materials	Applies where diaphragm compounds (EPDM, PTFE-faced) are used in process lines requiring compliant materials for regulated fluid contact.
3-A Sanitary Standards	Relevant for sanitary diaphragm valves used in processes requiring hygienic design, smooth internal surfaces, and cleanability.
CE Marking	Required for diaphragm valves supplied into projects or markets requiring compliance with applicable European directives.

Pneumatic Actuated Diaphragm Valve

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Electric Actuated Diaphragm Valve

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Ductile Iron Diaphragm Valve

Ductile Iron Diaphragm Valve Body: Ductile Iron, WCB Disc: Ductile Iron, WCB Lining: NBR, EPDM Diaphragm: NBR, EPDM Suitable Medium: Graphite, PTFE Nominal Diameter: DN15 to DN250 Nominal Pressure: PN6 to PN16, Class150 End Connection: Flanged Design Standard: BS 5156, BS 6755, ASME B16.5, BS 4505, EN 1092 Operation: Manual, Electric Actuated, Pneumatic Actuated Dimensions Unit: mm DN L D D1 D2 f b Z-Φd DO H 15 125 95 65 45 3 15 4-14 120 120 20 135 105 75 55 3 17 4-14 120 120 25 145 115 85 65 3 17 4-14 160 130 32 160 140 100 75 3 19 4-18 160 135 40 180 150 110 85 3 19 4-18 180 160 50 210 165 125 100 3 21 4-18 200 165 65 250 185 145 120 33 21 4-18 250 200 80 300 200 160 135 3 21 4-18 280 220 100 350 220 180 155 3 23 8-18 300 275 125 400 250 210 185 4 24 8-18 320 335 150 460 285 240 210 4 26 8-22 350 380 200 570 340 295 265 4 26 12-22 450 500 250 680 395 350 320 4 28 12-26 500 575

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Cast Iron Diaphragm Valve

Cast Iron Diaphragm Valve Body: Cast Iron, Ductile Iron, WCB Disc: Cast Iron, Ductile Iron, WCB Lining: NBR, EPDM Diaphragm: NBR, EPDM Suitable Medium: Graphite, PTFE Nominal Diameter: DN15 to DN250 Nominal Pressure: PN6 to PN16, Class150 End Connection: Flanged Design Standard: BS 5156, BS 6755, ASME B16.5, BS 4505, EN 1092 Operation: Manual, Electric Actuated, Pneumatic Actuated Dimensions Unit: mm DN L D D1 D2 f b Z-Φd DO H 15 125 95 65 45 3 15 4-14 120 120 20 135 105 75 55 3 17 4-14 120 120 25 145 115 85 65 3 17 4-14 160 130 32 160 140 100 75 3 19 4-18 160 135 40 180 150 110 85 3 19 4-18 180 160 50 210 165 125 100 3 21 4-18 200 165 65 250 185 145 120 33 21 4-18 250 200 80 300 200 160 135 3 21 4-18 280 220 100 350 220 180 155 3 23 8-18 300 275 125 400 250 210 185 4 24 8-18 320 335 150 460 285 240 210 4 26 8-22 350 380 200 570 340 295 265 4 26 12-22 450 500 250 680 395 350 320 4 28 12-26 500 575

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