Mechanical Device Hydraulic Valves
Description
Hydraulic valves are control devices used to adjust or manipulate the flow rate of a liquid or gas in a pipeline. They consist of a flow passage whose flow area can be varied, allowing for precise control over the fluid dynamics within a hydraulic system .
Working Principle
Hydraulic valves operate by using hydraulic actuators, which provide semi-automatic or automatic positioning of the valve. The most common type is the piston-type hydraulic actuator, which consists of a cylinder, piston, spring, hydraulic supply and return line, and stem. The actuator works by using hydraulic fluid pressure to move the piston, which in turn opens or closes the valve. When hydraulic fluid enters the chamber, it increases pressure, moving the piston against the spring force to open the valve. The valve closes when the hydraulic fluid is drained, allowing the spring to return the piston to its original position .
Applications
Hydraulic valves are used in a variety of applications where precise control of fluid flow is necessary. They are commonly found in industrial settings, such as in hydraulic systems for machinery and equipment. Specific examples include their use in main steam valves where a large force is required to open the valve, and in systems that require throttling by adjusting the amount of fluid in the chamber .
Advantages over other Hydraulic Valves
Hydraulic valves with piston-type actuators are advantageous because they can provide a large force to open valves, making them suitable for applications requiring significant power. They are also economical to use in both single valve systems and more complex valve systems, offering flexibility and cost-effectiveness .
Limitations
One limitation of hydraulic valves is that they require a hydraulic fluid supply to operate, which can introduce complexity and maintenance requirements into the system. Additionally, the need for precise control of hydraulic fluid pressure can be a challenge in some applications, potentially affecting the reliability and accuracy of the valve operation .
Considerations
When selecting hydraulic valves, several factors should be considered, including initial costs, operating expenses, durability, accuracy, and maintenance costs. Hydraulic actuators are available in a wide range of sizes, which can impact the initial cost. Operating expenses may include the cost of hydraulic fluid and energy to maintain pressure. Durability and accuracy are influenced by the quality of the valve and actuator design, while maintenance costs can vary depending on the complexity of the system and the frequency of required servicing .
from Rotork plc
High flow hydraulic Pilot and Mechanical valve with a Cv of upt 0.1 / 5L/Min, rated to 10,000 psi. Extensive range of operator options [See More]
- Actuation: Mechanical; Pilot
- Maximum Pressure: 10000.00
- Valve Type: Hydraulic; Pilot
from DFT Inc.
The DFT ® Model PDC ® Silent Check Valve is specially designed for use on the discharge side of reciprocating air or gas compressors. It includes a pulse damping chamber to maintain the disc in the open position during the momentary reductions in flow associated with each cycle of a... [See More]
- Actuation: Mechanical
- Valve Size: 2.00 to 12.00
- Valve Type: Check; Ball Check; Hydraulic
- Maximum Pressure: 3705.00
from Rotork plc
Hydraulic direct and indirect acting solenoid with high flow up to 3.8 cv/ 200 L/Min. 20,000 psi rated, suitable for high cycle applications due to ceramic ball [See More]
- Actuation: Mechanical; Pilot
- Maximum Pressure: 20000.00
- Valve Type: Hydraulic; Pilot
from DFT Inc.
The DFT ® Excalibur ® Silent Check Valve is a spring-assisted, center guided, in-line, check valve that provides reliable, low maintenance service for a wide range of fluids and pressure/temperature combinations. The valve consists of a body, gasket, seat, spring, disc with stem and guide... [See More]
- Actuation: Mechanical
- Valve Size: 2.00 to 24.00
- Valve Type: Check; Ball Check; Hydraulic
- Maximum Pressure: 3705.00
from DFT Inc.
The DFT ® Model DLC ® is a corrosion resistant, dependable, versatile and economical spring assisted, in-line check valve for a wide range of applications. Whether the fluid is liquid, gas or steam, the DLC ® provides tight shut-off and protects other equipment in the system from water... [See More]
- Actuation: Mechanical
- Valve Size: 0.50 to 3.00
- Valve Type: Check; Ball Check; Hydraulic
- Maximum Pressure: 720.00
from DFT Inc.
The FBC ™ is a compact, lightweight, insert wafer check valve that easily installs between two flanges. The in-line, spring assisted design prevents "water hammer" and "reverse flow". The FBC ™ contains all of the proven features of the Basic-Check ® valve developed by DFT ® over... [See More]
- Actuation: Mechanical
- Valve Size: 1.00 to 4.00
- Valve Type: Check; Ball Check; Hydraulic
- Maximum Pressure: 720.00
from DFT Inc.
The DFT ® Restrictor Check Valve (RCV) is a versatile, all-purpose, spring-assisted, in-line check valve for applications that require higher cracking pressures to open the check valve than those offered by other DFT ® check valves. Cracking pressures are available from 2 to 40 psi. Like the... [See More]
- Actuation: Mechanical
- Valve Size: 0.25 to 2.50
- Valve Type: Check; Ball Check; Hydraulic
- Maximum Pressure: 2500.00
from DFT Inc.
The DFT ® Model GLC ® Silent Check Valve is a spring-assisted, center guided, in-line, flanged check valve that provides reliable, low maintenance service for a wide range of fluids and pressure/temperature combinations. The valve consists of a body, seat, spring, disc with stem and guide... [See More]
- Actuation: Mechanical
- Valve Size: 1.00 to 24.00
- Valve Type: Check; Ball Check; Hydraulic
- Maximum Pressure: 6170.00
from DFT Inc.
The DFT ® Basic-Check ® valve is a versatile all-purpose, spring-assisted, in-line check valve that provides reliable, low maintenance service for a wide range of liquids and gases at various pressure/temperature combinations. The valve consists of a guard cage, spring, valve disc, retaining... [See More]
- Actuation: Mechanical
- Valve Size: 0.25 to 2.50
- Valve Type: Check; Ball Check; Hydraulic
- Maximum Pressure: 6000.00
from DFT Inc.
The DFT ® Model SCV ® is a corrosion resistant, dependable, versatile and economical spring-assisted, in-line check valve for a wide range of applications. Whether the fluid is liquid, gas or steam, the SCV ® provides tight shut-off and protects other equipment in the system from water... [See More]
- Actuation: Mechanical
- Valve Size: 0.50 to 3.00
- Valve Type: Check; Ball Check; Hydraulic
- Maximum Pressure: 3600.00
from DFT Inc.
DFT ® Vacuum Breakers provide effective protection against collapse of pressure vessels, tanks and rolls. They prevent condensate "back-up" when equipment is shut down or inlet steam is reduced by modulating control valves. In piping systems, DFT ® Vacuum Breakers are used to break siphons,... [See More]
- Actuation: Mechanical
- Valve Size: 1.00 to 4.00
- Valve Type: Check; Ball Check; Hydraulic; Anti-Siphon
- Maximum Pressure: 2500.00
from DFT Inc.
The ALC ® is an in-line, spring assisted, single guided "wafer" check valve designed to prevent "water hammer" and "reverse" flow. The lightweight compact design fits between mating flanges and meets API 594 Face-to-Face dimensions. The ALC ® is an easy to maintain check valve for... [See More]
- Actuation: Mechanical
- Valve Size: 10.00 to 24.00
- Valve Type: Check; Ball Check; Hydraulic
- Maximum Pressure: 720.00
from DFT Inc.
The DFT ® Model WLC Wafer style Silent Check Valve is a lightweight, spring-assisted, in-line check valve that provides reliable, low maintenance service for a wide range of fluids and pressure/temperature combinations. The joint between the seat ring and body is sealed by the flange gasket upon... [See More]
- Actuation: Mechanical
- Valve Size: 1.00 to 10.00
- Valve Type: Check; Ball Check; Hydraulic
- Maximum Pressure: 6170.00
from HAWE North America Inc.
These 2-way flow valves (drop rate braking valves), type SB or SQ, are used for flow control purposes with single acting cylinders. They maintain a constant drop rate irrespective of the size of the load. There is an integrated sliding metering orifice enabling free flow in the other direction. Type... [See More]
- Actuation: Mechanical
- Maximum Pressure: 4568.69
- Valve Type: Control Valve; Hydraulic
- Number of Ports: 2
from Equilibar, LLC.
Equilibar introduces a new type of vacuum regulator with more than 5X the flow stability of traditional spring regulators. That means that your vacuum process can remain stable even as gas flow rate changes over wide ranges. Can be used with manual set-point adjustment or computer automation. Is... [See More]
- Actuation: Mechanical; Pilot
- Valve Size: 0.25 to 4.00
- Valve Type: Control Valve; Hydraulic; Regulator
- Maximum Pressure: 0.00 to 14.74
from Atos North America
Hand and mechanical operated directional valves are spool type, three or four way, two or three position, designed to operate in oil hydraulic systems. Available version: mechanical actuator without lever. hand-lever. cam [See More]
- Actuation: Manual; Mechanical
- Valve Size: 0.24 to 0.98
- Valve Type: Spool; Directional; Hydraulic
- Maximum Pressure: 5076.32
from Stucchi Inc.
The VU series check valves are used in any type of hydraulic circuit, with a safe, compact design suitable to any hydraulic application using non-corrosive liquids. The VU size range includes two different standard openings at 5 to 65 psi. The VU series can also be used as a pressure sequence valve... [See More]
- Actuation: Mechanical
- Valve Size: 0.25 to 2.00
- Valve Type: Check; Hydraulic
- Number of Ports: 1
from Carr Lane Manufacturing Co.
Use individual clamping valves to clamp several workpieces independently with a single power source. 3-way clamping valves are used to control single-acting clamps. These high-quality valves have a zero-leakage poppet design, with a built-in check valve. Extremely compact. Available either with a... [See More]
- Actuation: Mechanical
- Valve Size: 0.25
- Valve Type: Hydraulic
- Maximum Pressure: 7500.00
from HydraForce, Inc.
A screw-in, cartridge-style, fixed orifice, pressure-compensated, hydraulic flow regulating valve (restrictive type). [See More]
- Actuation: Mechanical
- Valve Size: 0.25 to 0.50
- Valve Type: Cartridge; Hydraulic
- Maximum Pressure: 3500.00
from SC Hydraulic Engineering Corporation
The ICV series inline check valves are available in four port sizes from 1/4" NPT to 1" NPT and are rated up to 15,000 psig working pressure. Constructed of Stainless steel for use with water as well as most industrial fluids. The ICV series check valve is a simple and effective component allowing... [See More]
- Actuation: Mechanical
- Valve Size: 0.25 to 1.00
- Valve Type: Check; Ball Check; Directional; Hydraulic
- Maximum Pressure: 15000.00
from Barksdale Control Products
The Model 8014, part of the new 8010 series, incorporates all the manufacturing knowledge and experience that has earned Barksdale a reputation for top quality and reliability in the market. This unit is a 3/4" NPT relief valve intended for use in hydraulic systems. All stainless steel internals and... [See More]
- Actuation: Mechanical
- Maximum Pressure: 5500.00
- Valve Type: Hydraulic; Relief
- Number of Ports: 2
from Scott Rotary Seals
The WH series rotary timing valves (RTVs) are used for the transfer of high pressure hydraulic fluids from stationary piping to rotating machinery where automatic or manual on/off flow control is required. All WH series rotary timing valves are of cylindrical configuration with standard timing... [See More]
- Actuation: Mechanical
- Valve Size: 0.25
- Valve Type: Spool; Hydraulic; Rotary Timing Valve
- Maximum Pressure: 5000.00
from WEH Technologies Inc.
High-performance check valve for use with liquid media and air pressure. These brass check valves are specially designed for hydraulic and pneumatic applications in plant engineering and are well proven in applications with submesible pump, pressure, air conditioning systems, heating systems etc. [See More]
- Actuation: Mechanical
- Valve Size: 0.39 to 1.97
- Valve Type: Check; Hydraulic
- Maximum Pressure: 696.18
from HAWE North America Inc.
The check valves type CRK and CRB are used to block the flow in one direction and allow free flow in the opposite direction. The check valve type CRK is a spring pre-loaded ball seated valve and is intended to block the flow into the manifold, whereas type CRB is a shim type check valve, intended to... [See More]
- Actuation: Mechanical
- Maximum Pressure: 7251.89
- Valve Type: Check; Ball Check; Hydraulic
- Number of Ports: 2
from Equilibar, LLC.
Precision Back Pressure Regulator for Hygienic Service. For gas, liquid and mixed phase processes. Wide Range of working Pressures and Flows. Rugged 316 stainless steel Bar Stock Design with no Welded Fittings. Hygienic: No Crevices, <32Ra Finish. 3 Piece Low Dead Volume Design. Ports are the... [See More]
- Actuation: Mechanical; Pilot
- Valve Size: 0.50
- Valve Type: Control Valve; Hydraulic; Regulator; Relief
- Maximum Pressure: 0.00 to 150.00
from Stucchi Inc.
The VUX series check valves are used in any type of hydraulic circuit, with a safe, compact design suitable to any hydraulic application using non-corrosive liquids. The VUX size range is offered at a standard opening of 7.5 psi. The VUX series can also be used as a pressure sequence valve by... [See More]
- Actuation: Mechanical
- Valve Size: 0.25 to 1.50
- Valve Type: Check; Hydraulic
- Number of Ports: 1
from Carr Lane Manufacturing Co.
Simple hydraulic flow restrictor that allows fluid to flow in one direction only. In-line mounting [See More]
- Actuation: Mechanical
- Maximum Pressure: 7500.00
- Valve Type: Check; Hydraulic
- Number of Ports: 2
from HydraForce, Inc.
A screw-in, cartridge-style, pressure-compensated, non-adjustable flow regulator, intended for use in fixed displacement hydraulic circuits requiring partial pump flow diversion on a priority basis. [See More]
- Actuation: Mechanical
- Valve Size: 0.25 to 0.38
- Valve Type: Cartridge; Hydraulic
- Maximum Pressure: 3000.00
from SC Hydraulic Engineering Corporation
SC Pressure Release Valves are available in normally open and normally closed configurations. All of the valves are air actuated and are compatible with most fluids including water and synthetic compounds. Seals are Buna-N as standard (-N). Substitute "-V" for Viton® seals or "-E" for EPR.Typically,... [See More]
- Actuation: Mechanical
- Valve Size: 0.25
- Valve Type: Hydraulic; Relief
- Maximum Pressure: 5000.00
from Scott Rotary Seals
The WH series rotary timing valves (RTVs) are used for the transfer of high pressure hydraulic fluids from stationary piping to rotating machinery where automatic or manual on/off flow control is required. All WH series rotary timing valves are of cylindrical configuration with standard timing... [See More]
- Actuation: Mechanical
- Valve Size: 0.25
- Valve Type: Spool; Hydraulic; Rotary Timing Valve
- Maximum Pressure: 5000.00
from WEH Technologies Inc.
High-performance check valves with metal seals for use with liquid media. The series of check valves in carbon steel are especially designed for oil and hydraulic applications for use in industry and agriculture. The check valves use a metal-to-metal sealing system and do not need o-rings and... [See More]
- Actuation: Mechanical
- Valve Size: 0.16 to 1.97
- Valve Type: Check; Hydraulic
- Maximum Pressure: 4351.13
from HAWE North America Inc.
The check and pre-fill valves type F utilize a spring pre-loaded valve head. The check valves type F enable free flow in one direction and block the flow in the opposite direction. This valve is used as a high flow valve (check valve with hydraulic release) in top ram presses for quickly draining... [See More]
- Actuation: Mechanical
- Maximum Pressure: 5801.51
- Valve Type: Check; Hydraulic
- Number of Ports: 2
from Equilibar, LLC.
Precision Back Pressure Regulator. For gas & mixed phase processes. Rugged Bar Stock Design. Available in ¼ inch through 1 inch sizes. SS316 standard with Hastelloy C optional. Diaphragms available in PTFE, Hastelloy, SS316, and polyimide. The GS series is specifically designed for a... [See More]
- Actuation: Mechanical; Pilot
- Valve Size: 0.12 to 1.00
- Valve Type: Control Valve; Hydraulic; Regulator; Relief
- Maximum Pressure: 0.00 to 2500.00
from Stucchi Inc.
The VUZ series check valves are used in any type of hydraulic circuit, with a safe, compact design suitable to any hydraulic application using non-corrosive liquids. The VU size range includes two different standard openings at 5 to 65 psi. The VU series can also be used as a pressure sequence valve... [See More]
- Actuation: Mechanical
- Valve Size: 0.12 to 2.00
- Valve Type: Check; Hydraulic
- Number of Ports: 1
from Carr Lane Manufacturing Co.
Allows operating a single clamp, or group of clamps, at a lower pressure than the rest of the fixture. Can be used to finely adjust the clamping force of selected components while keeping others at full pressure. Great new design can be used on pallet fixtures disconnected from a power source, since... [See More]
- Actuation: Mechanical
- Valve Size: 0.25
- Valve Type: Hydraulic; Regulator
- Maximum Pressure: 7500.00
from HydraForce, Inc.
A screw-in, cartridge-style pressure-compensating element, intended for use with a remote fixed or variable orifice to yield a three-port (bypass-type), pressure compensated, flow regulating hydraulic valve. [See More]
- Actuation: Mechanical
- Valve Size: 0.25 to 0.50
- Valve Type: Cartridge; Hydraulic
- Maximum Pressure: 3000.00
from SC Hydraulic Engineering Corporation
The DRV series adjustable hydraulic relief valves are available in five pressure ranges between 100 psig and 60,000 psig. Constructed of Stainless steel the valves can be used for most industrial fluids including water. The valve once set will not allow system pressure to exceed design limitations. [See More]
- Actuation: Mechanical
- Valve Size: 0.25
- Valve Type: Blow Off; Hydraulic; Relief
- Maximum Pressure: 1000.00
from Scott Rotary Seals
The WH series rotary timing valves (RTVs) are used for the transfer of high pressure hydraulic fluids from stationary piping to rotating machinery where automatic or manual on/off flow control is required. All WH series rotary timing valves are of cylindrical configuration with standard timing... [See More]
- Actuation: Mechanical
- Valve Size: 0.25
- Valve Type: Spool; Hydraulic; Rotary Timing Valve
- Maximum Pressure: 5000.00
from HAWE North America Inc.
These check valves type B are available in three housing designs enabling in-line installation for any requirement. It is also possible to use these valves as foot valves in the suction line of pumps due to their low response pressure. [See More]
- Actuation: Mechanical
- Maximum Pressure: 7251.89
- Valve Type: Check; Hydraulic
- Number of Ports: 2
from Equilibar, LLC.
Standard Pressure Range: 0.02 (.5 ” WC) to 1500 psig. Ultra Low to Zero flow performance. Standard Cv from 1E-11 to 0.01. Standard 316L Stainless Steel Body; Hastelloy C and PTFE also available. NPT, VCR/VCO type and Valco (low dead volume) ends available. Wide Variety of Diaphragms Including... [See More]
- Actuation: Mechanical; Pilot
- Valve Size: 0.12
- Valve Type: Control Valve; Hydraulic; Regulator; Relief
- Maximum Pressure: 0.00 to 3000.00
from Carr Lane Manufacturing Co.
Use to automatically sequence positioning, clamping, and supporting functions as system pressure increases. Sequence Valves prevent fluid flow to a portion of the fixture until a predetermined trigger pressure is achieved (easily adjustable). Use in multiples for multi-stage sequencing. The version... [See More]
- Actuation: Mechanical
- Valve Size: 0.25
- Valve Type: Hydraulic
- Maximum Pressure: 150.00 to 7500.00
from HydraForce, Inc.
A screw-in, cartridge-style, load sense, flow-on-demand pressure-compensator. [See More]
- Actuation: Mechanical
- Valve Size: 1.00
- Valve Type: Cartridge; Hydraulic
- Maximum Pressure: 3000.00
from Scott Rotary Seals
The WH series rotary timing valves (RTVs) are used for the transfer of high pressure hydraulic fluids from stationary piping to rotating machinery where automatic or manual on/off flow control is required. All WH series rotary timing valves are of cylindrical configuration with standard timing... [See More]
- Actuation: Mechanical
- Valve Size: 0.25
- Valve Type: Spool; Hydraulic; Rotary Timing Valve
- Maximum Pressure: 5000.00
from HAWE North America Inc.
The check valves type HR with hydraulic release, are designed as manifold mounting valves and are available in six sizes. These valves are used in hydraulic circuits with design related, leaking directional valves, as hydraulically actuated drain, or idle circulation valves. The check valve type HRP... [See More]
- Actuation: Mechanical
- Maximum Pressure: 10152.64
- Valve Type: Check; Hydraulic
from Equilibar, LLC.
Precision Back Pressure Regulator. For liquid, gas & mixed phase processes. SS316 Rugged Bar Stock Design. Unique Chatter Suppression Feature in liquid only applications. High Precision and sensitivity. PTFE, stainless steel, and Hastelloy diaphragms available. The NL series back pressure... [See More]
- Actuation: Mechanical; Pilot
- Valve Size: 1.00 to 4.00
- Valve Type: Control Valve; Hydraulic; Regulator; Relief
- Maximum Pressure: 0.00 to 500.00
from HydraForce, Inc.
A screw-in, cartridge-style, priority-on-demand, pressure compensator with dynamic load sense intended to provide priority flow in the required amount, while allowing excess fl ow to be used for auxiliary functions. [See More]
- Actuation: Mechanical
- Valve Size: 0.62 to 0.75
- Valve Type: Cartridge; Hydraulic
- Maximum Pressure: 5000.00
from Scott Rotary Seals
The WH series rotary timing valves (RTVs) are used for the transfer of high pressure hydraulic fluids from stationary piping to rotating machinery where automatic or manual on/off flow control is required. All WH series rotary timing valves are of cylindrical configuration with standard timing... [See More]
- Actuation: Mechanical
- Valve Size: 0.25
- Valve Type: Spool; Hydraulic; Rotary Timing Valve
- Maximum Pressure: 5000.00
from HAWE North America Inc.
The screw-in check valves with hydraulic release type CRH and RHC are used in hydraulic circuits together with design related, leaking directional valves, as a hydraulically actuated drain, or idle circulation valves. The valves type RHC with or without pre-release (for high pressure and high... [See More]
- Actuation: Mechanical
- Maximum Pressure: 7251.89
- Valve Type: Check; Hydraulic
- Number of Ports: 2
from HydraForce, Inc.
A screw-in, cartridge-style priority-on-demand pressure-compensator with static load sense. [See More]
- Actuation: Mechanical
- Valve Size: 0.75 to 1.25
- Valve Type: Cartridge; Hydraulic
- Maximum Pressure: 3500.00
from HAWE North America Inc.
Shuttle valves are stop valves with two inlets and one outlet. There is a ball in the inside of the valve, which can travel from one inlet to the other. It will automatically block the one inlet with the lower pressure. This way the higher inlet pressure is automatically led to the outlet port. The... [See More]
- Actuation: Mechanical
- Maximum Pressure: 4568.69
- Valve Type: Check; Hydraulic; Shuttle Valve
- Number of Ports: 3