Diaphragm Valve for Pulse-Jet Cleaning Systems | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Diaphragm Valve

Definition

The diaphragm valve is a component used in machinery and equipment manufacturing, particularly within pulse-jet cleaning systems. In this application, it serves as a critical control element that regulates the release of compressed air pulses to clean filter elements. The valve precisely controls the timing and duration of air blasts that dislodge dust from filter bags or cartridges. Its design isolates the valve body from the operating mechanism via a flexible diaphragm, which prevents contamination and ensures reliable operation in dusty environments.

Typical specifications for such valves include nominal diameters from DN15 to DN300 (ISO 6708), operating pressures from 1.0 to 1.6 MPa, and operating temperatures from -40°C to 85°C, depending on diaphragm material. Leakage rates are rated at 0.01 ml/min (Class A) for resilient seats (ISO 5208). Flow coefficients (Cv) range from 2.5 to 1200 US gal/min. Actuation times are typically 1 to 5 seconds for pneumatic actuation, and for electric actuation, supply voltage is 24 V DC ±10% (IEC 60529) with a control signal of 4–20 mA (IEC 60529). Ingress protection for electric actuators is IP54–IP65 (IEC 60529). Body material is commonly CF8M stainless steel (ASTM A351), and diaphragm materials include PTFE and EPDM (ASTM D1418). Weight ranges from 5 to 150 kg depending on size and actuation type.

These values are directory reference ranges and must be confirmed for the specific model and application with the legal manufacturer or supplier. Standards listed are procurement references and do not imply certification or compliance of any particular product. Always verify model-specific parameters and standards before selection or installation.

Working Principle

When actuated, the diaphragm flexes to open or close the valve port. In pulse-jet systems, a solenoid or pilot valve typically controls the diaphragm, allowing rapid opening to release compressed air pulses and quick closing to conserve air. The diaphragm isolates the fluid from the actuator, preventing leakage and contamination. The valve's response time and sealing performance are critical for effective cleaning cycles.

Common Materials

EPDM rubber, Nitrile rubber, PTFE, Stainless steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	DN15–DN300 mm	Common range; larger sizes available on request.ISO 6708
Operating Temperature	-40–85 °C	Depends on diaphragm material.
Leakage Rate	0.01 ml/min	Class A (zero leakage) for resilient seats.ISO 5208
Flow Coefficient (Cv)	2.5–1200 US gal/min	Varies with size and stroke.
Actuation Time	1–5 s	Pneumatic actuation; depends on air supply.
Supply Voltage	24 ±10% V DC	For electric actuation.IEC 60529
Control Signal	4–20 mA	Analog positioner input.IEC 60529
Ingress Protection	IP54–IP65	For electric actuator enclosure.IEC 60529
Body Material	CF8M	Stainless steel; other alloys available.ASTM A351
Diaphragm Material	PTFE/EPDM	PTFE for chemical resistance; EPDM for steam.ASTM D1418
Weight	5–150 kg	Depends on size and actuation type.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Diaphragm Part
Flexible membrane that seals against valve seat to control flow

Material: EPDM rubber or PTFE
Valve Body
Houses internal components and provides fluid connections

Material: Aluminum or stainless steel
Solenoid Coil
Electromagnetic actuator that controls valve operation

Material: Copper wire with insulation
Valve Seat Part
Sealing surface against which diaphragm closes

Material: Stainless steel or plastic
Pilot Valve Optional
Small pilot stage that vents the back chamber so the main diaphragm can snap open.

Application & selection

Application Fit & Sizing Matrix

Operational Limits

pressure:	Up to 16 bar (standard), up to 25 bar (high-pressure designs)
flow rate:	Cv values typically 0.1 to 50 (depends on valve size)
temperature:	-20°C to 150°C (varies with diaphragm material)
slurry concentration:	Suitable for slurries up to 40% solids by weight (depends on particle size and abrasiveness)

Media Compatibility

✓ Pharmaceutical process fluids ✓ Corrosive chemicals (with PTFE/EPDM diaphragms) ✓ Food-grade applications (sanitary designs)

Unsuitable: High-temperature steam applications (>150°C)

Sizing Data Required

Required flow rate (Cv/Kv calculation)
Process pressure and temperature
Fluid characteristics (viscosity, solids content, corrosiveness)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Diaphragm fatigue cracking

Cause: Cyclic flexing from repeated actuation exceeding the elastomer's fatigue life, often accelerated by overpressure, temperature extremes, or chemical incompatibility.

Seat wear or erosion

Cause: Abrasive particles in the fluid stream, cavitation from high-pressure drops, or chemical attack degrading the seating surface, leading to leakage.

Maintenance Indicators

Visible external leakage around the valve body or bonnet area
Audible hissing or gurgling during operation indicating internal leakage past the seat

Engineering Tips

Implement a preventive diaphragm replacement schedule based on cycle count and fluid compatibility, rather than waiting for failure.
Install upstream filtration for abrasive services and ensure operating pressure drops remain within the valve's cavitation limits to protect the seat and diaphragm.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards

ISO 5208:2015 (Industrial valves - Pressure testing of valves) ANSI/FCI 70-2 (Control valve seat leakage) DIN 3202-1 (Diaphragm valves - General requirements)

Quoted from the published standard.

Manufacturing Precision

Bore diameter: +/-0.05mm
Diaphragm thickness: +/-0.1mm

Quality Inspection

Hydrostatic pressure test (to verify leak-tightness)
Dimensional inspection (critical mating surfaces)

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of Diaphragm Valve

12 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

China Sanitary Valve

Wenzhou, Zhejiang (manufacturing region per official site; registration and plant address to be verified), CN

The official KAYSEN website lists mini manual sanitary diaphragm valves for on/off and flow control and states that it can manufacture to customer drawings; company information describes the Chinese manufacturing entity and sanitary valve business. This entry covers sanitary diaphragm valves only; connections, pressure-temperature rating, materials and certificates must be confirmed separately and do not extend to high-purity gas or dust-collector pulse valves.

Listed on the company's own website · profile compiled by CNFX from public sources

View source page ↗ chinasanitaryvalve.com · recorded 2026-10-03

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CJan Fluid Technology Co., Ltd.

Shanghai, CN

ISO 9001:2015 IATF 16949

Also makes: Butterfly Valve, Water Flushing System, Dairy Flow Control Diaphragm Valve and 8 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Pneumatic Diaphragm Valve - PFDV”
View source page ↗ cjanfluid.com · recorded 2026-08-22

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Jianen Sanitary

Wenzhou, Zhejiang, CN

Founded 2009

3A CE ISO9001 SGS

Also makes: Dairy Flow Control Diaphragm Valve, Sanitary Pressure Relief Valve, Centrifugal Pump and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Sanitary Diaphragm Valve”
View source page ↗ jianen-sanitary.com · recorded 2026-08-22

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Shanghai Watson-Marlow Fluid Technology Co. Ltd.

Taiwan, CN

Founded 1956

ISO 9001:2015 IATF 16949

Also makes: Industrial Pumps, Process Pump, Capping Machine and 3 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “ASEPCO diaphragm valves”
View source page ↗ wmfts.com · recorded 2026-08-22

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Sunthai Extractor

Zhejiang, CN

200-500 staff20,000 m²

ISO 9001:2015

Also makes: Pharmaceutical-Grade Sterile Sampling Valve, Viewing Port, Sanitary Centrifugal Pump and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Sanitary Diaphragm Valve”
View source page ↗ sunthaiextractor.com · recorded 2026-08-22

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Wenzhou Deyi Machinery

Wenzhou, Zhejiang, CN

Also makes: Sanitary Centrifugal Pump, Dairy Flow Control Diaphragm Valve, Safety Relief Valve and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Sanitary Diaphragm Valve”
View source page ↗ technologyvalve.com · recorded 2026-08-22

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ANWVF

Wenzhou, Zhejiang, CN

Also makes: Gate Valve, Check Valve, Butterfly Valve and 5 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Diaphragm Valve”
View source page ↗ wvf-valve.com · recorded 2026-09-16

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AUTORUN Control

Shanghai, CN

Also makes: Pneumatic Actuator, Butterfly Valve, Control Valve and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Pneumatic Diaphragm Valve”
View source page ↗ autorun-control.com · recorded 2026-08-26

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AVM Extraordinary Intelligent Control (Zhejiang) Co., Ltd

Wenzhou, Zhejiang, CN

Also makes: Rapid Transfer Port (RTP), Butterfly Valve, Water Flushing System and 4 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Aseptic Diaphragm Valve”
View source page ↗ wzaomi.com · recorded 2026-09-03

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AVM Extraordinary Intelligent Control (Zhejiang) Co., Ltd.

Zhejiang, CN

Also makes: Dairy Flow Control Diaphragm Valve, Butterfly Valve, Pharmaceutical-Grade Sterile Sampling Valve and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Sanitary Diaphragm Valve”
View source page ↗ avmfluid.com · recorded 2026-08-27

View profile Send enquiry

Dombor

Hangzhou, Zhejiang, CN

Also makes: Butterfly Valve, Ball Valve, Check Valves and 7 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Diaphragm Valves”
View source page ↗ dombor.com · recorded 2026-09-13

View profile Send enquiry

Donjoy Technology

Wenzhou, Zhejiang, CN

Also makes: Sanitary Fittings, Butterfly Valve, Poppet/Valve and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Manual diaphragm valve”
View source page ↗ cndonjoy.com · recorded 2026-08-26

View profile Send enquiry

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Frequently Asked Questions

What is the typical operating pressure range for this diaphragm valve?

The typical operating pressure range is 1.0 to 1.6 MPa. Always confirm the exact range for your specific model with the manufacturer.

What diaphragm materials are available?

Common diaphragm materials include EPDM rubber, nitrile rubber, and PTFE. The choice depends on the application; for example, PTFE offers chemical resistance, while EPDM is suitable for steam. Verify material compatibility with your process.

How does the valve achieve rapid opening and closing?

In pulse-jet systems, a solenoid or pilot valve controls the diaphragm. When actuated, the diaphragm flexes to open the port, allowing a rapid release of compressed air. Quick closing is achieved by de-energizing the pilot, which conserves air.

What standards are referenced for this valve?

Standards referenced include ISO 6708 for nominal diameter, ISO 5208 for leakage, and flow, IEC 60529 for ingress protection and control signals, ASTM A351 for body material, and ASTM D1418 for diaphragm material. These are references for verification, not certifications.

Diaphragm Valve

Product Specifications

Application & selection

Application Fit & Sizing Matrix

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards

Procurement Evaluation Criteria

Manufacturers of Diaphragm Valve

Request manufacturing insight for Diaphragm Valve

Frequently Asked Questions

What is the typical operating pressure range for this diaphragm valve?

What diaphragm materials are available?

How does the valve achieve rapid opening and closing?

What standards are referenced for this valve?

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