Premium LPG/CNG Diaphragms Engineered for Automotive Gas Regulation

We offer a complete range of LPG/CNG diaphragms specifically designed for gas regulator applications, from standard flat diaphragms to advanced fabric-reinforced and custom-molded types, ensuring you get the perfect solution for your auto-rickshaw, CNG vehicle, or commercial gas regulation needs.

Diaphragm thickness: 0.20mm to 0.50mm precision gauge

Temperature range: -40°C to +120°C all-weather performance

Pressure rating: Up to 15 kg/cm² stable operation

Wide range of custom-molded rubber diaphragms in all sizes – manufactured by DST Rubber India

What Are LPG/CNG Diaphragms?

An LPG/CNG diaphragm is a precision-engineered flexible membrane designed to regulate gas pressure in automotive fuel systems. Made from high-quality gas-resistant rubber compounds with fabric reinforcement, these diaphragms are essential for applications where reliable sealing, extreme pressure sensitivity, and durability are required under continuous gas exposure. LPG/CNG diaphragms are used in a wide variety of applications, including:

Automotive OEM Applications

Factory-fitted CNG/LPG systems in three wheelers, cars, and commercial vehicles.

Aftermarket Gas Conversion Kits

Replacement diaphragms for Lovato, BRC, Tomasetto, Landi Renzo regulators.

Gas Pressure Regulators

Single-stage and two-stage regulators for precise fuel pressure control.

Our LPG/CNG Diaphragm Products

LPG/CNG diaphragms are used in a wide variety of automotive gas regulation applications, including:
Fuel Resistive Diaphragms - DS Techno Rubbers

Auto-Rickshaw LPG/CNG Kit Diaphragms

OEM-grade diaphragms for three-wheeler gas kits, trusted by Bajaj, Piaggio, TVS with 3+ million units fitted and zero failures.
air brake chamber diaphragm - DS Techno Rubbers

Fabric-Reinforced Gas Regulator Diaphragms

Ultra-thin 0.20mm diaphragms with fabric reinforcement for LPG/CNG applications, highly sensitive to 0.1 kg/cm² pressure variations & resistant to extreme temperatures.

Pump Diaphragm - DS Techno Rubbers

Single-Stage Regulator Diaphragms

Precision diaphragms for compact single-stage regulators, providing reliable pressure reduction from tank to engine-ready pressure.
Flow Control Diaphragms - DS Techno Rubbers

Two-Stage Regulator Diaphragms

Advanced diaphragms for multi-stage pressure control systems, ensuring smooth gas flow modulation and enhanced regulation accuracy.
Windmill Diaphragm - DS Techno Rubbers

Commercial Vehicle CNG Diaphragms

Heavy-duty diaphragms for buses, trucks, and fleet vehicles, engineered for extended service life and demanding operating conditions.
Instrumentation Diaphragm - DS Techno Rubbers

Aftermarket Replacement Diaphragms

Universal-fit replacement diaphragms compatible with Lovato, BRC, Tomasetto, Landi Renzo and all major regulator brands.
Flow Control Diaphragms - DS Techno Rubbers

Sequential Injection System Diaphragms

Ultra-sensitive pressure-sensing diaphragms for electronic CNG/LPG injection systems in modern BS-VI compliant vehicles.
Windmill Diaphragm - DS Techno Rubbers

Custom OEM Diaphragms

Application-specific diaphragms engineered to exact specifications for regulator manufacturers and automotive OEMs.

Types of LPG/CNG Diaphragms

We offer LPG/CNG diaphragms in flat, molded, fabric-reinforced, and custom types for all gas regulators.
Flat Fabric-Reinforced Diaphragms
Simple, flat design with fabric reinforcement. Used in compact LPG/CNG regulators where minimal pre-forming is needed. Ideal for auto-rickshaw gas kits and basic single-stage regulators.
Pre-formed to specific regulator chamber geometries. Ideal for OEM applications requiring optimized pressure curves and high precision. Used in Bajaj, Piaggio, TVS factory-fitted systems.

Designed to roll within regulator housing, minimizing wear. Used in high-displacement gas regulators and advanced pressure control systems. Offers extended service life in commercial applications.

Feature flexible folds for greater movement capability. Suitable for variable pressure applications and high-stroke regulator designs requiring compact size.

Multiple material layers for enhanced durability. Gas-resistant inner layer with reinforced backing. Ideal for extreme conditions and high-pressure commercial vehicle systems.
Ultra-sensitive for electronic control systems. Used in sequential CNG injection and modern BS-VI compliant vehicles requiring precise pressure feedback.

Why Choose Ds Techno Rubber LPG/CNG Diaphragms?

High-Pressure Resistance

Our diaphragms are engineered to withstand up to 15 kg/cm² regulator pressures, ensuring longevity and reliable performance across all automotive gas applications.

Zero-Failure Track Record

Over 3 million diaphragms fitted with zero recorded product failures — demonstrating unmatched field reliability and long service life in real-world conditions.

100% Leak Testing

Every diaphragm undergoes rigorous in-house leak testing before dispatch, ensuring absolute sealing performance, safety compliance, and zero gas permeation.

Ultra-Precision Engineering

With 0.20mm precision thickness and fabric reinforcement, we ensure every diaphragm is manufactured to exacting standards for optimal pressure sensitivity.

OEM-Trusted Quality

Trusted by major automotive OEMs including Bajaj Auto, Piaggio Vehicles, and TVS Motor Company for factory-fitted and aftermarket applications.

Custom Engineering Solutions

We offer customized diaphragms tailored to specific regulator requirements, including different sizes, thickness, compounds, and reinforcement patterns.

Gas-Resistant Materials

Specialized NBR, HNBR, and ECO compounds chosen for excellent LPG/CNG resistance, minimizing permeation and swelling in harsh fuel environments.

Automotive Standards Compliance

Our diaphragms comply with AIS-026 and ECE R110 automotive standards, making them suitable for Indian and international gas regulation systems.

Features Of Our LPG/CNG Diaphragms

High Sensitivity and Precision

Responsive to 0.1 kg/cm² pressure changes, ideal for automotive gas regulators requiring instant, accurate fuel control.

LPG/CNG Chemical Resistance

Designed to withstand continuous exposure to harsh gas environments, oils, and hydrocarbons without swelling or cracking.

Extreme Durability

Built for 5+ million cycles and long-lasting performance under dynamic regulator conditions from -40°C to +120°C.

Superior Pressure Fidelity

Sensitive to minute pressure variations, ensuring precise performance in auto-rickshaw and commercial vehicle gas regulation.

Fabric-Reinforced Strength

High flexibility with tensile strength for constant movement and stress in regulator pressure chambers.

Zero-Leak Integrity

100% individually tested for absolute sealing performance, preventing dangerous gas leakage and ensuring safety compliance.

Custom LPG/CNG Diaphragms for Your Needs

Get in touch today to discuss custom LPG/CNG Diaphragms tailored to your precise needs!

Why Choose Dst rubber

Industries We Serve

Automotive OEMs
Gas Conversion Kit Manufacturers
Regulator Manufacturers
Fleet Operators
Aftermarket Distributors
Gas Equipment Suppliers

Why DS Techno Rubber?

35+ Years of Expertise

We bring decades of experience in designing and manufacturing custom rubber components.

Precision Engineering

Each diaphragm is crafted with the highest level of attention to detail.

Superior Materials

We use only the finest rubber compounds to ensure durability and performance.

Global Reach

Serving industries in India, the USA, and Germany with high-quality products and on-time delivery.

FAQ

LPG/CNG diaphragms are specifically engineered with gas-resistant elastomers that resist swelling and degradation from hydrocarbon exposure. They feature ultra-thin construction (0.20mm) with fabric reinforcement for high sensitivity while maintaining durability—properties standard diaphragms lack.

Fabric reinforcement provides tensile strength and dimensional stability essential for millions of actuation cycles. It prevents tearing and permanent deformation while allowing thin rubber to remain flexible enough to respond to pressure changes as low as 0.1 kg/cm². Without reinforcement, thin diaphragms would fail prematurely.

These diaphragms are made from gas-resistant elastomers like Nitrile (NBR), Hydrogenated Nitrile (HNBR), and Epichlorohydrin (ECO), combined with reinforcement fabrics such as Nylon or Polyester. The choice depends on factors like LPG/CNG compatibility, temperature resistance (-40°C to +120°C), and required cycle life.

Under normal conditions, quality diaphragms last 5+ years or 100,000+ km. Replacement depends on usage intensity, operating environment, and maintenance practices. Signs of needed replacement include rough idling, difficulty starting, reduced fuel efficiency, or gas smell near the regulator.

We manufacture diaphragms compatible with most major brands including Lovato, BRC, Tomasetto, Landi Renzo, and OEM regulators (Bajaj, Piaggio, TVS). For specific compatibility, provide regulator model or sample. We can also develop custom diaphragms for unique specifications.

Every diaphragm undergoes 100% individual leak testing using helium or pressure decay methods, plus visual and dimensional inspection. Batch samples undergo pressure cycling (5 million cycles), chemical resistance testing in LPG/CNG, temperature cycling, and tensile strength verification.

Yes, our LPG/CNG diaphragms comply with AIS-026 (Indian automotive LPG/CNG standards) and are ECE R110 compatible. We maintain comprehensive quality documentation and material certifications required by OEMs and regulatory bodies.

Standard designs: 100 pieces minimum. Custom designs requiring new tooling: 1,000-5,000 pieces depending on complexity. Prototype quantities (25-50 pieces) available for testing and validation at reasonable pricing.

Standard designs in stock: 24-48 hours dispatch. Standard designs not in stock: 1-2 weeks production. Custom designs: 2-3 weeks sampling, 3-4 weeks full production. Emergency expedited options available for critical requirements.

We offer OEM-quality with zero-failure track record, 100% leak testing, local manufacturing (no import delays/duties), competitive pricing, technical support, and proven reliability with 3+ million units in service. Total cost of ownership is significantly lower than imports.

Get a Custom Quote

Looking for high-quality LPG/CNG diaphragms for your automotive gas regulator needs? We’re here to provide you with precision-engineered solutions that meet your exact specifications. Simply fill out the form below, and we’ll provide a personalized quote with technical recommendations.