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:
| | | | | | |
Remote Pilot Model | | | | | | |
| | | | | | |
| | |
| |
| |
| NBR (Standard), FKM (Optional) |
| |
| 24VDC, 24VAC, 110VAC, 220VAC |
Applications:
Industrial Dust Removal Systems
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.
Chemical Industry
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.
Food Industry
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.
Automotive Manufacturing
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.
High-Temperature Environment Industries
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.
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Supplementary Notes on Industry-Specific Terms
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 Name: Pulse Valve Diaphragm
Description: High-quality diaphragm for pulse valves, made of
durable and long-lasting material.
Package Contents: - 1 Pulse Valve Diaphragm - User Manual
Shipping Information: - Shipping Method: Standard Shipping -
Estimated Delivery Time: 5-7 business days - Shipping Cost: $5.99
