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Stainless Steel Pressure Compensator
At the outlet of the cooling water circulation system’s pump and other locations, pressure balancing and compensation are required. Canned‑type or diaphragm‑type pressure‑compensation devices are typically employed; due to the nature of the process fluid, these units are usually fabricated from stainless steel and other suitable materials, and are custom‑designed to match the system’s pressure and flow characteristics.
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Specialized balancing cylinder products
Stainless Steel Pressure Compensator
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At the outlet of the cooling water circulation system’s pump and other locations, pressure balancing and compensation are required. Canned or diaphragm-type pressure‑compensation devices are typically employed; due to the nature of the process fluid, these units are usually fabricated from stainless steel and other suitable materials, and are custom‑designed to match the system’s pressure and flow conditions.
SCHWERLL We offer professional stainless steel pressure compensators, with the following product features:
Airbag / Diaphragm-type pressure accumulator (commonly referred to as a pressure stabilizer, used to absorb pressure fluctuations)
Official Name: Expansion Tank / Pressure stabilizing tank / Pulsation dampers are commonly used at the outlet of closed-loop cooling water pumps.
1. Working principle
The rubber bladder inside the tank separates air from water; the air chamber is pre‑charged with nitrogen.
- Pump start-up, water hammer, and sudden load changes → As the pipeline network pressure rises, water enters the tank and compresses the air bladder, thereby absorbing pressure surges.
- Valve closed, flow rate drops sharply, and water temperature decreases, causing contraction. → As pressure decreases, the airbag expands to return water to the pipeline, compensating for the pressure drop.
2. In the cooling water system, its core function is to be installed at the pump outlet.
- Water hammer suppression: The impact pressures generated by pump start-up and shutdown, as well as rapid valve closure, are mitigated, thereby protecting heat exchangers, pipelines, and flanges.
- It dampens pressure pulsations, stabilizes pressure gauge readings, and reduces vibration and noise.
- Closed-loop cooling water: compensates for volumetric changes caused by thermal expansion and contraction, thereby preventing frequent activation of the overflow valve.
- It slightly compensates for minor system leaks, thereby slowing the pressure drop.
3. Installation Key Points
- Installation location: on the straight pipe section downstream of the pump outlet, and downstream of the check valve (to prevent water hammer from directly impacting the pump body).
- Precharge pressure: Precharge pressure = System static pressure × 0.7 ~ 0.8 ; The cooling water system at ambient temperature is generally 0.2 ~ 0.5 MPa ；
- A ball valve must be installed. + Drain valve for convenient maintenance and isolation; series‑connected throttling valves are strictly prohibited.
- Pump start-up, water hammer, and sudden load changes → As the pipeline network pressure rises, water enters the tank and compresses the air bladder, thereby absorbing pressure surges.
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Email: schwerlltec@schwerll.com.cn
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