JOIL JISI20 JISR20 3/4'' Pulse Valve Diaphragm JICI20 JICR20 Diaphragm Valve Repair Kit

Product Description:

Translation of JOIL Pulse Valve Diaphragm Properties

As the core sealing and control component of JOIL pulse valves, the diaphragm has the following main properties:

Material Characteristics:
Common materials include Nitrile Butadiene Rubber (NBR) and Fluororubber (FKM). NBR diaphragms have good oil resistance and wear resistance, making them suitable for conventional working conditions with oil-containing compressed air; FKM diaphragms exhibit excellent high-temperature resistance (-20°C to 200°C) and corrosion resistance, adapting to harsh environments such as high temperatures, strong acids, and alkalis. Some diaphragms adopt a reinforced structure (e.g., an internal fabric reinforcement layer) to improve tear resistance and service life.

Temperature Adaptation Range:
NBR diaphragms are generally suitable for working environments ranging from -30°C to 120°C. FKM diaphragms can withstand high temperatures from -20°C to 200°C, and some special models can work briefly at even higher temperatures.

Physical Properties:
Uniform thickness, typically ranging from 1.5mm to 3mm, designed according to the valve port size to ensure precise fit with the valve body’s sealing surface. High elastic recovery rate: After the pulse valve opens and closes at high frequency (several times per second), it can rebound quickly to maintain sealing performance, with an elastic recovery rate of ≥85% usually. Tensile strength ≥15MPa and tear strength ≥30kN/m, providing good mechanical strength to resist pulse pressure impact.

Service Life:
Under standard working conditions (0.4–0.6MPa pressure, normal-temperature clean air), the service life of the diaphragm can reach more than 1 million cycles; high-quality FKM diaphragms can extend the service life to over 2 million cycles.

Structural Design:
Adopts a lip-sealing structure with a lip height of 0.5–1mm, ensuring tight fit with the valve body under pressure, with a leakage rate ≤0.1L/min (under a test pressure of 0.8MPa). The central part is equipped with a positioning structure matching the valve core to ensure synchronization of movement and avoid sealing failure caused by deviation.

Compatibility:
Specialized diaphragms are designed for different models of JOIL pulse valves (e.g., right-angle type, submerged type). They feature high dimensional accuracy with a tolerance range of ≤±0.1mm, ensuring installation compatibility.

These properties collectively ensure that JOIL pulse valves achieve efficient and stable blowing control in dust removal systems, reducing equipment downtime caused by diaphragm failure.

Key Technical Terminology Note

Fabric Reinforcement Layer: A layer of high-strength fiber fabric (e.g., nylon, glass fiber) embedded in the diaphragm material. It enhances the diaphragm’s resistance to stretching and tearing without compromising its elasticity, which is crucial for prolonging service life in high-frequency operation.

Lip-Sealing Structure: A common sealing design for diaphragms. The raised "lip" (thin edge) on the diaphragm deforms slightly under pressure, closely fitting the valve body’s sealing surface to block air leakage—this structure is more reliable than flat sealing for pulse valves with frequent on-off cycles.

Pulse Pressure Impact: The instantaneous pressure change when the pulse valve releases compressed air (usually 0.4–0.8MPa). The diaphragm must withstand this repeated impact without permanent deformation, which depends on its tensile strength and elastic recovery performance.

Technical Parameters:

Goyen Type ASCO Type SBFEC Type

Turbo Type Mecair Type JOIL Type

Norgren Type AUTEL Type Taeha Type

Applications:

As a key component of the pulse blowing system in baghouse dust collectors, JOIL pulse valve diaphragms are widely used in dust removal equipment across industries such as iron and steel, cement, and electric power. They can open and close rapidly to control the pulse blowing of compressed air, enabling dust cleaning of filter bags. This not only ensures dust removal efficiency but also extends the service life of the filter bags.

Some JOIL pulse valve diaphragms are made of corrosion-resistant materials such as fluororubber (FKM), which exhibit excellent corrosion resistance. Thus, they can be used in chemical production processes to control the flow and pressure of various corrosive gases or liquids—for example, in scenarios like the transportation of acid-alkali solutions and gas control for chemical reaction kettles.

The food processing industry has strict hygiene requirements. If JOIL pulse valve diaphragms are made of food-grade compliant materials, they can be used for pneumatic control in food packaging, material transportation, and other links, ensuring the safety and hygiene of the food production process.

During processes such as painting and welding in automotive manufacturing, dust and fumes are generated, which require purification by dust removal equipment. JOIL pulse valve diaphragms can be applied in the dust removal systems of automotive manufacturing workshops to keep the workshop air clean. This provides a good working environment for workers and also helps improve product quality.

Industries such as metallurgy and ceramics involve the purification of high-temperature flue gas. The high-temperature-resistant models of JOIL pulse valve diaphragms can operate stably under high-temperature working conditions. With high-temperature-resistant materials and special structural designs, they can withstand pulse pressure impacts in high-temperature environments and achieve efficient dust cleaning.

Baghouse Dust Collector: A core piece of dust removal equipment that uses filter bags (made of fabric or non-woven materials) to trap dust particles from gas. The pulse valve diaphragm’s rapid on-off action drives compressed air to blow off dust adhering to the filter bags, maintaining the bags’ filtration efficiency.

Food-Grade Compliant Materials: Materials that meet international food safety standards (e.g., FDA certification in the US, EU 10/2011 regulations). These materials are non-toxic, odorless, and do not release harmful substances, making them suitable for direct or indirect contact with food.

High-Temperature Flue Gas: Flue gas with a temperature typically exceeding 150°C, generated during processes like metal smelting (metallurgy) and ceramic sintering. High-temperature-resistant diaphragms (e.g., FKM-based) are essential to avoid material deformation or failure in such environments.

Packing and Shipping:

Product: Pulse Valve Diaphragm

Description: High-quality diaphragm for pulse valves

Package Contents: 1x Pulse Valve Diaphragm

Shipping Method: Standard Shipping

Shipping Time: 3-5 business days