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FD-2H type differential pressure control valve (for water / hot water) | VENN Co., Ltd., a fluid control valve
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WVD-02 type differential pressure relief valve (for water / hot water) | VENN Co., Ltd., a fluid control valve
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Module 140: Pressure-independent control valves in variable volume heating and cooling systems – CIBSE Journal
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DPAF961 / DPAR961 - Differential Pressure Control Valve (DPCV) - Female Ended (DPAF961 - Flow / DPAR961 - Return) - Bronze | Crane Fluid Systems - Our Genius Is Valves
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