Pump Flexible Expansion Joint
The Pump Flexible Expansion Joint is a rubber connector installed between a pump and the adjoining pipeline. It is used on centrifugal, circulating, sewage, and cooling-water pumps, as well as packaged pumping equipment, on either suction or discharge connections.
Description
pump flexible expansion joint
Product Overview
The Pump Flexible Expansion Joint is a rubber connector installed between a pump and the adjoining pipeline. It is used on centrifugal, circulating, sewage, and cooling-water pumps, as well as packaged pumping equipment, on either suction or discharge connections.
Core Specifications and Parameters
|
Parameter Item |
Index Details |
|
Product Model |
REJ |
|
Nominal Diameter |
DN40-DN600 (clamp type); DN15-DN4000 (flange type) |
|
Working Pressure |
PN6-PN40 |
|
Connection Method |
Flange / clamp optional |
|
Flange Standard |
Customizable for DIN, JIS, ANSI, GB |
|
Flange Material |
Carbon steel, SS304, SS316 stainless steel |
|
Rubber Material |
EPDM, NR, NBR, PTFE lining |
|
Working Temperature |
-15~+80℃, special rubber -30~+150℃ |
|
Test Pressure |
1.5 times the working pressure |
|
Burst Pressure |
2 times the working pressure |
|
Applicable Media |
Tap water, sewage, circulating oil, weak acid and alkali wastewater |
|
Warranty Period |
12 months |
|
Customization Service |
OEM branding, clamp / flange structure interchange, thickened pressure bearing customization |
Core Advantages
1. Thickened double-layer vibration body. Dense polyamide-cord reinforcement is built for the high-frequency motion produced by centrifugal, circulating, and sewage pumps. During repeated starting, stopping, and continuous operation, the sphere interrupts vibration transmission before it reaches pipe supports, valves, instruments, and building structure.
2. Separate suction and discharge construction. Positive-pressure models control expansion on pump discharge lines, while vacuum-reinforced models maintain an open bore on suction lines. Under negative pressure, the reinforced wall and support structure resist inward collapse that would restrict inlet flow and reduce pump performance.
3. Flange or quick-clamp equipment connection. Flanged models cover fixed pump rooms, while DN40 to DN600 clamp versions shorten removal time on compact or mobile pump units. During maintenance and skid assembly, the specified connection eliminates improvised adapters that add dead length and alignment error.
Customization Capabilities
Pump interface: Flanged or quick-clamp ends, installed length, and drilling standard are matched to the pump and adjoining pipe.
Suction or discharge design: Wall reinforcement, vacuum support, movement rating, and control rods are configured for the actual side of the pump.
Wetted materials: EPDM, NBR, or PTFE lining and the flange material are selected for the pumped medium.
Quality Control
Rubber compound, cord reinforcement, flange material, and connection dimensions are checked before production. The reinforcement around the pump-side flange bead is inspected during lay-up, and vulcanization parameters are recorded. Finished joints are checked for concentricity, sealing-face condition, movement clearance, and control-rod adjustment. Every unit undergoes pressure and leak testing at 1.5 times the specified working pressure. Vacuum-rated models receive the corresponding negative-pressure verification before final inspection.
FAQ
Q: Are free samples available?
A: Yes. Standard samples can be supplied free of product charge. Freight and any special flange machining are confirmed before dispatch.
Q: How are large pump joints packed for shipment?
A: Large units receive individual surface protection, waterproof wrapping, cushioning around the flanges, and internal fixing inside reinforced wooden cases.
Q: Should the joint be installed on the suction side or discharge side?
A: It may be installed on either side when the pressure or vacuum rating matches the service. The pump and piping must be independently supported.
Q: How far should it be installed from the pump nozzle?
A: Install it close enough to isolate vibration, but leave room for bolt access, inspection, and the required straight pipe arrangement specified by the pump manufacturer.
Hot Tags: pump flexible expansion joint, China pump flexible expansion joint suppliers, factory, double arch rubber bellows, double sphere expansion joint dn400 size specification, natural rubber expansion joint, Ptfe Bellows Expansion Joints, Rubber Shaft Coupling Joint, triple arch expansion joint dn400 size specification
Send Inquiry
You Might Also Like
