Check Valves Specifications

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Valve Type



	Your choices are...
	Ball / Disk Check Valves		Ball and cone check valves use a free-floating or spring-loaded ball, cone, or disk resting in a seat ring as the closure element. Upon reverse flow, the ball is forced back into its seat preventing backflow.
	Cartridge / Manifold Valves		Cartridge valves are directional control valves that are inserted into manifolds to provide a cost-effective, compact system design.
	Double Check Valves		Double check valves are assemblies that contain two distinct check valves.
	Duckbill Valves		Duckbill valves are flow-sensitive, variable-area, check valves. They get their name from their shape, which consists of two flaps shaped like a duck's bill. In zero flow conditions, the valve remains closed. As the flow increases, the pressure on the flaps increases and the valve opens.
	Foot Valves		Foot valves are a type of check valve with a built-in strainer. They are used at the point of liquid intake to retain liquid in the system.
	Lift Check Valves		Lift check valves use a free-floating closure element, consisting of a piston or poppet and a seat ring. The piston or poppet actuates either horizontal or vertical to the flow, depending on the valve construction.
	Poppet Check Valves		Poppet valves open and close ports with a sealing device composed of a disk, cone, or sphere that is pressed against the seating surface using a spring.
	Swing Check Valves		Swing check valves are designed with the closure element attached to the top of the cap. The closure element can be pushed aside by the flow, but swings back into the close position upon flow reversal.
	Umbrella Check Valves		Umbrella check valves are elastomeric self activating devices. These valves simply press into a hole and can be designed to function within a specified pressure range. The name umbrella comes from the general shape of the device.
	Wafer / Split Disc Check Valves		Wafer and split disc check valves have two half-circle disks hinged together. Upon positive flow, the disc come together and retracts to a full-circle to close against reverse flow.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Severe Service Rated		The valve is designated by manufacturer as being suitable for severe service applications where there is continuing operational, maintenance or reliability issues with a given application.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Back Flow Preventer Assembly		Back flow preventers are assemblies of two check valves and two shut-off valves. They may also include test cocks for each chamber within the assembly.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

Material of Construction



	Your choices are...
	Acetal		Acetal polymers are semi-crystalline. They offer excellent inherent lubricity, fatigue resistance, and chemical resistance. Acetal suffers from outgassing problems at elevated temperatures, and is brittle at low temperatures. Glass filled, and added lubrication grades are available, flame-retardant grades are not. Brand names include Celcon® (Hoechst Celanese), Delrin® (DuPont), Thermocomp® (LNP), Ultraform® (BASF), and Acetron® (DSM).
	Aluminum		Aluminum is a bluish silver-white malleable ductile light trivalent metallic element that has good electrical and thermal conductivity, high reflectivity, and resistance to oxidation.
	Brass / Bronze		Brass comes with good strength, excellent high temperature ductility and reasonable cold ductility, good conductivity, excellent corrosion resistance, good bearing properties and low magnetic permeability. Sintered bronze is a porous material, which can be impregnated with oil, graphite or PTFE. Not suitable for heavily loaded applications but useful where lubrication is inconvenient.
	Cast Iron		The term "cast iron" refers not to a single material, but to a family of materials whose major constituent is iron, with important trace amounts of carbon and silicon. Cast irons are natural composite materials whose properties are determined by their microstructures - the stable and metastable phases formed during solidification or subsequent heat treatment. The major microstructural constituents of cast irons are: the chemical and morphological forms taken by carbon, and the continuous metal matrix in which the carbon and/or carbide are dispersed.
	CPVC		Chlorinated polyvinyl chloride (CPC) a higher type grade of plastic commonly used for hot / cold water distribution, sprinkler piping, and some chemicals. Suitable for high temperatures.
	Copper		A common reddish metallic element that is ductile and malleable and is one of the best conductors of heat and electricity.
	Ductile Iron		Ductile iron retains cast iron's machinability and corrosion-resistance, and provides additional strength, toughness, and ductility. Although it’s chemical properties are similar to those of cast iron, ductile iron incorporates significant casting refinements, additional metallurgical processes, and superior quality control.
	Exotic Metal		Exotic metals and alloys have specialized properties. This category includes materials such as Hastelloy®, Monel®, beryllium copper, beryllium nickel, niobium, tantalum, titanium and zirconium.
	Polyethylene (PE)		Commodity thermoplastic that is soft, flexible and tough - even at low temperatures - with outstanding electrical properties but poor temperature resistance. It also has very good chemical resistance but is prone to environmental stress cracking; it has poor UV resistance (unless modified) and poor barrier properties, except to water.
	Polypropylene (PP)		Polypropylene is a thermoplastic material exhibiting excellent cold flow, bi-axial strength, and yield elongation properties. It is similar to PVC but can be used in exposed applications because of its resistance to UV, weathering, and ozone.
	PTFE - Teflon®		Polytetrafluoroethylene (PTFE) is an insoluble compound that exhibits a high degree of chemical resistance and a low coefficient of friction. It is sometimes marketed in proprietary classes of materials such as Teflon®, a registered trademark of DuPont Dow Elastomers.
	PVC		Polyvinyl Chloride (PVC) is a widely used material that has good flexibility, smooth surface, and nontoxic qualities. Some grades are used in food and chemical processes due to the inert nature of PVC. Brand names include: ACP® and Dural® (Alpha Gary), Geon® (Geon), Benvic® (Solvay), Flexalloy® (Teknor Apex).
	PVDF		Polyvinylidene fluoride (PVDF) is a melt processable fluoropolymer. It is similar in properties to other fluoropolymer, but has better strength and lower creep than the other members of this family. PVDF has good wear resistance, and excellent chemical resistance. But does not perform well at elevated temperatures. Brand names include: Kynar® (Elf AtoChem).
	Rubber		Any of several material compositions with properties similar to natural rubber.
	Stainless Steel		Stainless steel is chemical and corrosion resistant and can have relatively high-pressure ratings.
	Steel		Steel is a commercial iron that contains carbon in any amount up to about 1.7 percent as an essential alloying constituent. It is malleable when under suitable conditions, and is distinguished from cast iron by its malleability and lower carbon content.
	Other		Other unlisted, specialized, or proprietary material.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Specifications


	Valve Size		Valve size is the designated size of the valve by manufacturer. This typically represents the size of the passage opening.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Pressure Rating		Maximum safe pressure value for which the valve is rated.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Media Temperature		Maximum temperature of media the valve is designed to accommodate.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Flow (Cv)		The valve flow coefficient is the number of U.S. gallons per minute of 60 degree F water that will flow through a valve at a specified opening with a pressure drop of 1 psi across the valve. It is used to predict flow rates.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Connection
	Your choices are...
	Threaded		The valve has internal or external threads for inlet or outlet connection(s).
	Compression Fitting		A sealed pipe connection without soldering or threading. As the nut on one fitting is tightened, it compresses a washer around the second pipe, forming a watertight closure.
	Bolt Flange		The valve has a bolt flange(s) for inlet or outlet connection.
	Clamp Flange		The valve has a clamp flange(s) for inlet or outlet connection.
	Union		The valve has a union connection for inlet or outlet connection(s).
	Tube Fitting		The valve has a connection for directly joining tubing at the inlet and/or outlet connections.
	Butt Weld		The valve has a butt weld sized connection for inlet or outlet connection.
	Socket Weld / Solder		The valve has a socket weld connection for inlet or outlet connection.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Media Description



	Your choices are...
	Air		The valve can handle all types of non-pressurized air.
	Compressed Air		Compressed air is under a pressure greater than atmosphere.
	Water		Any type of water.
	Hot Water		Water that has been heated.
	Cold Water		Unheated water to cool.
	Potable Water		Potable water is considered safe and fit for human consumption, culinary and domestic purposes and meets the requirements of the health authority having jurisdiction.
	Salt Water		Water has a high concentration of salt, often from the ocean or sea.
	Wastewater		Wastewater is the spent or used water of a community or industry that contains dissolved and suspended matter.
	Gas		Any type of gas, although generally excluding air.
	Gasoline / Diesel Fuel		Gasoline / diesel fuel is a mixture of flammable liquid hydrocarbons derived chiefly from crude petroleum and used as a fuel for internal-combustion engines.
	High Purity Gas		High purity gas is designated by manufacturer as being applicable and built for high purity applications - includes nitrogen, argon, oxygen, hydrogen, and H.P. mixtures.
	LP - Gas		Liquefied petroleum is a gas containing specific hydrocarbons that are gaseous under normal atmospheric conditions, but can be liquefied under moderate pressure and temperatures. Propane and butane are examples.
	Natural Gas		Natural gases are liquid hydrocarbon mixtures that are gaseous at reservoir temperatures and pressures, but are recoverable by condensation or absorption.
	Sour Gas		Sour gas is hydrogen sulfide (H₂S) laden gas.
	Specialty / Corrosive Gases		Specialty corrosive gases.
	Hydraulic Fluid		Hydraulic valves contain and transfer the flow and pressure of hydraulic fluid in hydraulic power systems. They range from simple shutoff valves to precise control valves used in motion control systems.
	Powder / Solids		Media in solid or powder state.
	Steam		Water in a gaseous state at a temperature above its boiling point.
	Other		Other unlisted, specialized, or proprietary media.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Agency / Standard



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	ANSI		Meets American National Standards Institute (ANSI) standards.
	API		Meets American Petroleum Institute (API) standards.
	ASME		Meets American Society of Mechanical Engineers (ASME) standards.
	AWWA		Meets American Water Works Association (AWWA) certification.
	MSS		Meets Manufacturers Standardization Society (MSS) specifications.
	DIN		Conforms to a DIN standard of configuration.
	ISO		Meets International Organization for Standardization requirements.
	NSF		Meets National Sanitation Federation (NSF) standards.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Check Valves Specifications

Valve Type:

Severe Service Rated?

Back Flow Preventer Assembly?

Material of Construction:

Valve Size:

Pressure Rating:

Media Temperature:

Flow (Cv):

Connection:

Media Description:

Agency / Standard:

Help with Check Valves specifications: