Copper Check Valve 3/8" ODF Solder – Straight Type, with Strainer (One-Way Valve)

The copper-body 3/8" (9.52 mm) check valve is a one-way valve (check valve) that allows refrigerant to pass in one direction only in refrigeration and air conditioning installations and automatically shuts off reverse flow. Both ends have 3/8" ODF solder connections and are brazed directly to the tube. The arrow on the body shows the flow direction; the strainer mesh at the inlet end prevents coarse dirt in the line from reaching the valve.

Where Is It Used?

• In parallel-connected evaporators: in the suction lines of evaporators operating at different temperatures, to prevent refrigerant migration from the warm evaporator to the cold one.
• In parallel compressors: in the discharge line, to prevent backflow to a stopped compressor.
• In heat pump circuits: to direct flow around the expansion valve and filter drier according to the operating mode.
• In hot gas defrost circuits: to prevent flow from passing into the unwanted branch during defrost.

Installation

• Position the valve so that the arrow on the body points in the direction of flow.
• Remove the protective caps on the ends just before brazing; this prevents moisture and dirt from entering the tube.
• During brazing, cool the body with a wet cloth, direct the flame at the ends and pass nitrogen through the line. The internal parts can be damaged by excessive heat.

Technical Specifications

• Type: Straight-through check valve (one-way valve)
• Body: Copper
• Connection: 3/8" (9.52 mm) ODF solder, inlet and outlet the same size
• Inlet: With strainer mesh
• Flow direction: Marked with an arrow on the body
• Delivery: Ends fitted with protective caps

Frequently Asked Questions

Which way is a check valve installed?

The arrow on the body shows the direction in which the flow will pass. Flow in the direction of the arrow passes freely; flow in the opposite direction is shut off.

What is the difference between a check valve and a solenoid valve?

A check valve requires no electricity and only shuts off reverse flow. A solenoid valve, on the other hand, opens and closes by means of a coil and can stop flow in both directions.

Are other sizes available?

The 3/8", 1/2", 5/8", 3/4" and 7/8" sizes of the copper check valve are available as separate products on our site; select the size according to the tube outside diameter.