Top 6 Best Check Valves

Product Size34 Thread Female. This valve is used to prevent the back flow of fluids. Maximum pressure rating 200 psi200 WOG water, Oil, gas. This valve has a brass body with a stainless steel spring for long-lasting durability. Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability.

Material this check valve is made of ABS plastic, and the internal valve core is made of silicone, ABS plastic has high hardness, good heat resistance and corrosion resistance, strong resistance to acids and alkalis, and is resistant to organic solvents to some extent. Suitable size you will get 6 no-return check valves with a size of 38 inch, which is 1.61 inches long, enough quantity to meet your use of check valves in different situations to prevent fluid backflow. Function introduction 38 check valve is applied in fluid system to prevent fluid backflow, or applied in pneumatic system to prevent compressed air backflow This check valve can be applied in the temperature range of -20 degrees Celsius to 70 degrees Celsius. Widely use one-way valve can be applied in water process, air purification, automobile parts, machinery industry, household appliances, etc., to effectively prevent backflow of the medium. Note when installing the check valve, pay special attention to the flow direction of the medium The normal flow direction of the medium should be consistent with the arrow direction indicated on the valve body, otherwise the normal flow of the medium will be cut off.

Clear PVC for corrosion resistance, high strength, and less weight than fittings made from metal. Full flow design for insignificant flow loss at swing check. Slip connection for easy attachment. Maximum pressure rating 150 psi. Meets ASTM and ANSI standards.

Specification 14 NPT.. Media Water ,Oil ,Gas.. Material Stainless Steel 316.. Pressure 6000PSI. Temperature rating -15 to 170-33--400.. One piece of Viton O-Ring is included in the package for extra use..

For Oxygen Pumps Only Great 1-way check valve for most common aquarium air pumps. NOT suitable for CO2 or other high-pressure systems to avoid crack and leak.. Small Light Size 2.1 L x 0.55 W Diameter of air holes 0.12 Weight 0.1 oz. Standard ID airline tubing 316. Add little weight to your hose for smooth airflow.. Ideal Pump Protectors Prevent backflow of water through the tubing during a power outage or pump pause. Essential accessories for basic aeration setup in your fish tanks.. Sturdy Quiet Made of reliable plastic which can be tightly connected to the hose without air leak. Durable to endure long-time use without making noise.. Easy Maintenance Clean the valve regularly. Please poke it with a slim stick from the inlet side to push it open when it gets clogged inside and restricts air flow..

HYDRO MASTER Brass Dual Check Valve, 12 FNPT, Solid Brass, Max 150PSI-180F.

Specially designed non-return valves will protect your air pump by preventing aquarium water from back siphoning during a power outage. They are made of plastic material for long time use. Place these air pump check valves in your airline tubing between your air pump and aquarium water to prevent water returning down the air line. Fits standard aquarium airline tubing with inner diameter about 4mm. Dimension 0.5D x 2.1L Includes 10pcs check valves.

No lead brass construction. 1 in. x 1 in. female NPT. Prevents backflow in well or irrigation systems. Abrasion resistant O-ring fitted to the poppet for a positive seal. Can be used in both vertical and horizontal positions.

Material Plastic barb connector, made of high-quality PVED material. Size 18 OD One Way Check ValveCan fit 18 hose ID. FunctionThe check valves are applicable for fluid systems to prevent countercurrent liquids, or for pneumatic systems to prevent reverse flow of compressed air.. PerformanceHose barb check valves Opening pressure 0.5 Kpa, Maximum back pressure 300Kpa. Normal performance under 25 to 60 ,Strong resistance to acid, alkali, salt corrosion ability. DesignThe check valve is designed with a non-slip card slot inside, which has strong adsorption performance, prevents falling off, non-toxic, and has air tightness..

Schedule 40 PVC construction for strength and resistance to corrosion and mild chemicals. EPDM seal for resistance to water and oils. Maximum pressure rating of 150 psi. Spring tension of 12 lb. for secure closure of valve. 3 slip connections.