The liangda rubber expansion joints are designed for piping systems to absorb pipe movements, relieve stress, reduce system noise/vibration, compensate for misalignment/offset and to protect rotating mechanical equipment against start-up surge forces.
Because of rubber has superior capability in resistance of acid, alkali, oil, and electrolytic, rubber expansion joint has become one of the alternatives of stainless steel and been successfully installed in tough demanding applications such as: chemical/petrochemical, marine, power generation, pulp/paper, steel mills and water/wastewater treatment.
The single sphere rubber joint is a single sphere design with less length, the supply range is from 25mm to 3000mm, and design pressure can be 1.0mpa/1.6mpa/2.5mpa, which is always used where low cost or space limitation control.
Rubber expansion joints features and benefits:
1, versatile hand-built construction. Made in china
2, absorbs directional movement
3, absorbs vibration, noise and shock
4, compensates for misalignment
5, wide flowing arch design
6, virtually eliminates sediment buildup
7, economical fully molded construction
8, high vacuum rating (up to 30" hg) can be supplied for certain sizes
9, special grooved flange ring design, prevent rubber end pulling out
10, solid galvanized steel floating flanges speed the installation time
11, high tensile aircraft cable is embedded in the raised face rubber ends to prevent pull out and avoids the sharp cutting edge of solid steel rings
12, no gaskets required; integrally rubber flanged design, no gaskets required, din pn10/16 drilling standard, other flange drilling available, including ansi 150lb/300 lb, bs, and jis.
We pack rubber expansion joints with neylon bags, wooden box, and according to your requirement.
Duckbill check valves, widely used in the demanding applications of many industries, are precision-molded, one-piece elastomeric valves that provide reliable backflow prevention at low pressure differentials. Duckbill check valves allow free flow with positive differential pressure. With negative differential pressure, backflow is checked. Pressure drop across the valve is a feature unique to duckbill check valves. They can be designed to operate in a few millimeters (inches) of water to several hundred kpa (psi), depending on valve size, geometry and compound characteristics. Duckbill check valves are also designed to start functioning at specific opening and closing pressure ranges, depending on your specifications.
•normally open one-way check valves
•prevents backflow leakage when minimal backpressure is applied
•can be installed easily into hole and sealed by compressing flange
Duckbill check valve features:
Reliable backflow prevention
100% elastomeric construction eliminates maintenance
Will not corrode, warp or freeze open or shut
1”-2” cracking pressure, low head loss
Curved bill enhances sealing around debris
Custom built for each application based on pressure and flow conditions
Available in diameters from 1/2" (12mm) to 96” (2400mm)
Note:
1. The inner diameters are matched to the pipe outer diameter on which installed.
2. The weight is approximate.
3. The dimensions are not integrated in the above table, contact liangda for more information.
4. We can make duckbill valves with any dimensions rubber flange available as per requirement.
5. Pcs are the number of half part of the clamps.
6. The usual material of the clamp is stainless steel 304, other material availble upon request.
7. Duckbill valves of dimensions in the above table are available in inventory. Any other dimensions and designs available upon request.
Plastic bags , wooden box , or as requested
Flexible expansion joint with rubber flange
Flexibe expansion joints are designed for piping systems to absorb pipe movements, relieve stress, reduce system noise/vibration, compensate for misalignment/offset and to protect rotating mechanical equipment against start-up surge forces.
Rubber flexible expansion joint has been successfully installed in tough demanding applications such as: chemical/petrochemical, marine, power generation, pulp/paper, steel mills and water/wastewater treatment.
Features and benefits:
1, versatile hand-built construction. Made in china
2, absorbs directional movement
3, absorbs vibration, noise and shock
4, compensates for misalignment
5, wide flowing arch design
6, virtually eliminates sediment buildup
7, higher pressure rating than conventional expansion joints
8, high vacuum rating (up to 30" hg) can be supplied for certain sizes
9, economical fully molded construction
10, solid galvanized steel floating flanges speed the installation time
Size
(dn50~200)
(dn250~1200)
Working pressure mpa
2
10
Explosion pressure mpa
>5
>2
Vacuum kpa(mmhg)
53.3(400)
44.9(350)
Temperature
-20--115 centigrade(for special requirements could reach to-30--250 centigrade )
Media
Air, compressed air, water, sea water
Heated water, oil, acid, alkali
Note:
1. Supply range can be up to dn3000, detailed data can be offered upon request.
2. Control units must be used when piping is not properly anchored.
3. The rated pressure 2.5mpa products will only be sold with control units.
4. Pressure rating is based on 30¡ãc operating temperature. The pressure rating is reduced at higher temperatures.
5. Weights in the above table are joints with din pn16 drilling retaining ring flanges.
Plastic bags, wooden box, or according to your demand
