We have various of rubber compound available as below for different applications.

The rubber diaphragm is a precision functional element of pumps, valves, actuators, and control devices. We provides high-performance rubber diaphragms designed for demanding global industrial applications, from dust collection pulse valves to steam solenoid valves, chemical dosing pumps, pressure regulators, and automated control systems.

Different rubber diaphragms: Engineered for Every Challenge

We manufacture diaphragms in three primary configurations to match your specific requirements:

Type	Description	Best Suited For
Pure Rubber Diaphragms	Homogeneous elastomer construction	Low-pressure, general purpose applications
Fabric-Reinforced Diaphragms	Rubber bonded to reinforcing fabric (nylon, fiberglass, Nomex)	High-pressure, high-cycle applications requiring tear resistance
Metal-Composite Diaphragms	Metal inserts encapsulated in rubber	Precision mounting, threaded connections, high-stress points

Technical Specifications:

Below are verified performance parameters sourced from established manufacturers—not theoretical maximums, but achievable specifications you can design around.

Material Performance Matrix

Material	Temperature Range	Hardness (Shore A)	Key Properties	Typical Applications
NBR (Nitrile)	-30°C to +120°C	40-90	Excellent oil/fuel resistance	Automotive fuel systems, hydraulic oils
FKM/FPM/Viton (Fluoroelastomer)	-20°C to +250°C	50-90	Chemical resistance, high-temp stability	Chemical processing, aerospace
VMQ (Silicone)	-60°C to +230°C	25-85	Extreme flexibility, FDA compliance	Medical devices, food processing
FVMQ (Fluorosilicone)	-70°C to +205°C (short-term to 250°C)	40-80	Combines silicone’s temperature range with fluorocarbon’s oil resistance, excellent fuel resistance	Aerospace fuel systems, automotive sensors, chemical diaphragms, military equipment
EPDM	-50°C to +150°C	40-90	Weather/ozone resistance, steam	Outdoor equipment, hot water systems
FFKM (Perfluoroelastomer)	-10°C to +280°C	65-95	Universal chemical resistance	Aggressive acid/base environments

Performance Ratings

Parameter	Range Available	Precision Grade
Thickness	0.15 – 5.0 mm	±0.02 mm for reference
Diameter	30 – 600 mm	Custom design
Pressure Rating	0 – 110 bar	Up to 2.5 MPa continuous
Temperature	-70°C to +280°C	Depending on material
Cycle Life	1.5M+ cycles	Validated
Hardness	40 – 90 Shore A	±5 Shore A
Reinforcing Fabrics	Nylon, Fiberglass, Nomex, Polyester	Multiple options
Specialized Materials	FKM, VMQ, FVMQ, EPDM, NBR, FFKM	Multiple options

Deep Dive: Pulse Jet Valve Diaphragms

Among our most requested products are diaphragms for pulse jet dust collectors—a critical component in environmental control systems for power plants, cement factories, and chemical processing facilities.

How They Work

1. Signal Received: The pulse controller sends an electrical signal, activating the solenoid pilot
2. Pressure Release: The pilot opens the vent port, releasing pressure from above the diaphragm
3. Valve Opens: Higher pressure below the diaphragm lifts it, allowing compressed air to blast through
4. Cleaning Cycle: The air pulse cleans filter bags
5. Rapid Closure: Signal ends, pilot closes, pressure rebalances, diaphragm seals

Why Diaphragm Quality Matters

In pulse valves, the diaphragm’s rear chamber has a larger area than the front, creating the pressure differential that keeps the valve sealed. A worn diaphragm cannot maintain this differential, leading to:

• Loss of sealing (cannot “lock air”)
• Continuous air leakage
• System pressure drop
• Failed cleaning cycles
• Premature filter clogging

Material Selection Guide: Choosing the Right Diaphragm

For High-Temperature Environments

Fluoroelastomer (FKM) diaphragms offer:

• Continuous operation up to 250°C
• Short-term exposure up to 310°C
• Excellent chemical resistance to oils, acids, and solvents

Note on FKM limitations: While excelling in heat and chemical resistance, FKM’s low-temperature performance is limited. Below 0°C, service life decreases significantly. For arctic conditions, consider silicone or fluorosilicone alternatives.

For Extreme Low-Temperature Flexibility

Silicone (VMQ) diaphragms provide:

• Flexibility down to -60°C
• Non-toxic, odorless performance
• FDA-compliant grades for medical/pharmaceutical use
• Excellent compression set resistance

Silicone’s remarkable low-temperature performance makes it the material of choice for medical devices (artificial tracheas, lung assist devices) and outdoor automation in cold climates.

For Aggressive Chemical Environments with Temperature Extremes: Fluorosilicone (FVMQ)

FVMQ (Fluorosilicone) diaphragms represent a unique hybrid material that bridges the gap between silicone and fluorocarbon elastomers. By incorporating trifluoropropyl groups into the silicone polymer backbone, FVMQ delivers the best of both worlds.

Customization: Your Diaphragm

We offer rubber diaphragms customization solutions :

Design Parameters, We Can Adjust

• Thickness: From ultra-thin 0.15mm sensing diaphragms to heavy-duty 5.0mm sealing elements
• Shape: Round, square, custom contours, flat or convoluted profiles
• Hardness: 40 to 90 Shore A to match actuation forces
• Reinforcement: Single or double-sided fabric, embedded metal inserts
• Coating: PTFE coatings for non-stick surfaces, conductive layers for static dissipation

Our team works with you to:

1. Analyze your operating conditions (pressure, temperature, media)
2. Recommend optimal material compounds
3. Design for manufacturability
4. Prototype building
5. Lunch to mass production

Please contact our product engineering team to request a quote, discuss your application, build samples for testing.