Product Description:
I. Core Material Properties
The material of the pulse valve diaphragm is the key to determining
its performance. Dahe pulse valve diaphragms mostly use elastomer
materials. The common types and their characteristics are as
follows:
- Nitrile Butadiene Rubber (NBR):
Advantages: Good oil resistance, suitable for working conditions with oil
mist; moderate elasticity and low cost.
Limitations: General temperature resistance (usually -20℃~120℃), weak ozone
aging resistance. - Fluoroelastomer (FKM):
Advantages: Excellent high and low temperature resistance (-20℃~above 200℃),
strong resistance to chemical corrosion, ozone and aging, suitable
for high-temperature and strong corrosive working conditions (such
as chemical industry, metallurgy industry).
Limitations: Higher cost, slightly lower elasticity than nitrile rubber. - Ethylene Propylene Diene Monomer (EPDM):
Advantages: Good weather resistance and ozone resistance, resistant to water
vapor and weak acid corrosion, and applicable to a wide temperature
range (-40℃~150℃).
Limitations: Poor oil resistance, not suitable for oil-containing environments.
Some high-end models will use composite materials (such as rubber
combined with fabric skeleton) to enhance tear resistance and
strength.
II. Physical and Mechanical Properties
Elasticity and Resilience:
The diaphragm needs to open and close quickly under the impact of
high-frequency (several to dozens of times per minute) pulse
airflow. Therefore, it must have high elasticity to ensure that the
sealing surface fits tightly without leakage; resilience ensures
that it is not easy to deform after long-term use.
Tensile Strength and Tear Strength:
During operation, the diaphragm will be subjected to tensile force
generated by air pressure. Insufficient tensile strength can easily
lead to rupture; tear strength prevents further expansion of edges
or tiny damaged areas, extending the service life.
Hardness:
Materials with Shore hardness of 60~80A are usually used. Too low
hardness can easily lead to poor sealing, and too high hardness
will affect elasticity and response speed.
Temperature Resistance:
The appropriate material is selected according to the working
temperature. For example, fluororubber diaphragms are needed for
high-temperature dust collectors (flue gas temperature above 120℃),
and nitrile rubber diaphragms can be used for normal temperature
working conditions.
III. Working Characteristics
Sealing Performance:
The fitting surface between the diaphragm and the valve seat needs
to be precisely processed to ensure complete sealing when there is
no pulse signal, preventing compressed air leakage, and avoiding
energy waste and reduction of dust removal efficiency.
Response Speed:
Triggered by the pulse control signal, it needs to open quickly
(usually in milliseconds) to make compressed air spray into the
filter bag instantly to complete ash cleaning; it also closes
quickly to reduce invalid jet time.
Medium Resistance:
It needs to withstand moisture and oil stains in compressed air (or
clean air after drying and purification), as well as dust that may
rush back (such as when the filter bag is damaged). Therefore, it
must have the characteristics of wear resistance and chemical
erosion resistance.
Technical Parameters:
| Conventional nitrile rubber (NBR) | -20 ℃~80 ℃, Suitable For Room Temperature Drying Conditions |
| Fluororubber (FKM) | -20 ℃~200 ℃ (some Models Can Reach 260 ℃), Suitable For High
Temperature And Corrosive Environments (such As Chemical And Waste
Incineration) |
| Working pressure range | 0.4-0.7MPa |
| Diaphragm Material | NBR |
| Brand | TAEHA |
| Color | Red Green Black |
Applications:
Working Condition Adaptation: The material is selected according to the temperature of the dust
removal system, medium (oil-containing, corrosive gas, etc.), and
pulse pressure (usually 0.2~0.6MPa). For example:
- Corrosive environments such as waste incineration plants and
chemical workshops → fluororubber diaphragms;
- Normal temperature and non-corrosive environments such as wood
processing and grain processing → nitrile rubber diaphragms.
Service Life: Under normal working conditions, the service life of high-quality
diaphragms can reach 100,000~300,000 pulse cycles (about 1~3
years), which depends on the material, working temperature, pulse
frequency and maintenance conditions. Improper maintenance (such as
a large amount of moisture in compressed air leading to accelerated
aging of the diaphragm) will significantly shorten its service
life.
In conclusion, the core properties of Dahe pulse valve diaphragm
can be summarized as " high elasticity, strong sealing, fatigue resistance, and strong
adaptability ". Its performance is directly related to the stable operation of
the pulse valve and even the entire dust removal system. When
selecting, the material, size and mechanical properties should be
comprehensively considered in combination with the actual working
conditions.
Packing and Shipping:
Product Name: Pulse Valve Diaphragm
Description: High-quality diaphragm for pulse valves, made of
durable material for long-lasting performance.
Package Includes: 1 x Pulse Valve Diaphragm
Shipping Information:
- Shipping Method: Standard Shipping
- Estimated Delivery Time: 5-7 business days
- Shipping Cost: $5.99
