Supplier product
Shijiazhuang High & Middle Pressure Valves Manufacturer
Hydraulically opened, normally closed shutoff valve with remote pressure release.
This QDY421F version uses a hand-operated oil-pump circuit to open the normally closed valve. The supplier describes closure after hydraulic-pressure release and a fusible-plug response to excessive heat. Like the pneumatic version, it is a one-direction shutoff selection, so the marked flow direction is part of installation selection.
Shijiazhuang High & Middle Pressure Valves Manufacturer · Shijiazhuang, Hebei
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Source reviewed: 2026-11-07. This directory summary organises the supplier’s published product information.
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