Hydraulic Valves Specifications

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Valve Type



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	Block and Bleed Valves		Block and bleed valves are configured so that flow through the valve is blocked at both the inlet and outlet, and a small port is provided to drain or depressurize the space between. This configuration is often required to isolate high-pressure sections of a system to facilitate safe maintenance or rapid depressurization. These valves are also referred to as double block and bleed valves.
	Cartridge / Manifold Valves		Cartridge valves are directional control valves that are inserted into manifolds to provide a cost-effective, compact system design.
	Check Valves		Check valves are self-activating safety valves that prevent process flow from reversing.
	Control Valves		Control valves or proportional valves are power-operated devices used to modify fluid flow or pressure rate in a process system.
	Directional Valves		Directional valves direct or prevent flow through selected passages.
	Diverter Valves		Diverter valves change the direction of the flow of a medium to two or more different directions.
	Drain Valves		Drain valves allow the removal of surplus fluid from a system or container.
	Metering Valves		Metering valves are capable of accurately controlling the flow of a fluid.
	Needle Valves		Needle valves have a slender, tapered point at the end of the valve stem that is lowered through the seat to restrict or block flow. Fluid flowing through the valve turns 90 degrees and passes through an orifice that is the seat for a rod with a cone shaped tip. These small valves are widely used to accurately regulate the flow of liquids and gases at low flow rates. The fine threading of the stem and the large seat area allow for precise resistance to flow. Advantages: Precise control. Disadvantages: low-pressure limitations, no slurries.
	Pressure Relief Valves		Pressure relief valves are self-actuated safety valves designed to relieve excess upstream pressure from the line.
	Regulators		Regulators maintain a constant outlet pressure.
	Safety Valves		Safety valves contain a thermal sensing component that opens or closes in response to temperature changes or close a line and stop the flow of material when a pre-set condition occurs.
	Solenoid Valves		Solenoid valves are electro-mechanical devices that utilize a solenoid to control valve activation.
	Spool Valves		Spool valves use a rotary or piston-like spool for actuation. The spool, or spools, rotate or slide back and forth to block and uncover ports in the housing.
	Toggle Valves		Toggle valves are used for on-off control in moderate pressure and temperature applications. They feature a toggle mechanism for valve actuation.
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Specifications


	Valve Size		Valve size is the designated size of the valve by manufacturer. This typically represents the size of the passage opening.
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	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.

	Number of Ports/Ways		Represents the number of connections or inlet / outlet ports to the valve.
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Actuation


	Actuation
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	Manual / Hand		The valve is actuated (opened or closed) via a hand operated wheel or crank.
	Mechanical Device		A mechanical device such as a float or cam activates the valve. This does not include powered actuators.
	Electric		An electric actuator activates the valve.
	Electro-hydraulic		A servo valve that produces hydraulic control in response to an electrical signal input.
	Electro-pneumatic		A servo valve that produces pneumatic control in response to an electrical signal input.
	Pilot Operated		A pilot valve activates the valve.
	Pneumatic		The valve is activated by a pneumatic actuator or cylinder to open and close valve.
	Thermally Actuated		The valve is activated by a change in temperature in the handled media. Typically, temperature and pressure relief occurs once a preset temperature is reached.
	Other		Other unlisted, specialized, or proprietary actuation method.
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Hydraulic Valves Specifications

Valve Type:

Valve Size:

Pressure Rating:

Number of Ports/Ways:

Actuation:

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