Diaphragm-type hand valve

Diaphragm-type hand valves are manual flow control components for refrigeration systems. They precisely control the flow of media and flow rate by manually rotating the diaphragm opening, suitable for unidirectional flow.
They are used in liquid and air intake lines in refrigeration, refrigeration, and air conditioning systems.
Manufactured using corrosion-resistant materials according to standards, they undergo sealing and pressure resistance testing.
Pre-sales selection and after-sales maintenance guidance are provided, offering precise adjustment, excellent sealing, easy operation, and a long service life.
This diaphragm-type hand valve, a dedicated manual shutoff component for refrigeration systems, utilizes a diaphragm-actuated mechanism. Manual rotation of the diaphragm opening controls the flow of media and flow rate. It strictly restricts fluid flow to one direction, effectively preventing system pressure imbalances or component damage caused by refrigerant backflow. It ensures precise control of the flow direction and meets the needs of unidirectional flow control in various operating conditions. This hand valve is widely applicable in refrigeration systems, refrigerators, and air conditioning units. Specifically, it can be installed in the system's liquid pipeline (for precise control of refrigerant liquid delivery rate), suction pipeline (for stable regulation of return air flow to ensure efficient compressor operation), and hot gas pipeline (for controlling hot gas bypass to balance system temperature). This applies to a wide range of equipment, including residential central air conditioners, commercial refrigerated display cabinets, and small industrial cold storage, providing reliable support for media control in refrigeration systems.
In terms of interface specifications, this hand valve is divided into two categories: the first is a threaded connection (SAE), offering a full range of thread sizes from 1/4 SAE to 3/4 SAE, suitable for piping applications requiring easy disassembly, eliminating the need for specialized welding tools for installation and maintenance; the second is an open-end welded connection (ODF), covering interface sizes from 1/4" to 7/8", providing more stable sealing performance after welding and suitable for refrigeration pipelines with long-term operation and high sealing requirements. Both interface types can meet different installation environments and usage requirements.