PARKER proportional valve D41FHB31F1NE00 in stock

Brand

PARKER/Parker (USA)

PARKER proportional valves can control flow in two ways:

One is on/off control: either fully open or fully closed, the flow is either at its maximum or minimum, with no intermediate state, such as ordinary solenoid direct-flow valves, solenoid directional valves, and electro-hydraulic directional valves.

The other is continuous control: the valve can open to any degree as needed, thereby controlling the flow rate. These valves can be manually controlled, such as throttle valves, or electrically controlled, such as proportional valves and servo valves.

Therefore, the purpose of using proportional valves or servo valves is to achieve throttling control of flow rate through electrical control (of course, pressure control can also be achieved through structural modifications). Since it is throttling control, there is inevitably energy loss. Servo valves differ from other valves in that their energy loss is greater because they require a certain flow rate to maintain the operation of the pre-stage control circuit.

PARKER Proportional Valve Features

1) Enables stepless adjustment of pressure and speed, avoiding the impact phenomenon during directional switching of normally open on/off valves.

2) Enables remote control and program control. 3) Compared to intermittent control, the system is simplified, with a significant reduction in components.

4) Compared to hydraulic proportional valves, it is smaller, lighter, simpler in structure, and lower in cost, but its response speed is much slower than hydraulic systems, and it is more sensitive to load changes.

5) It uses less power, generates less heat, and produces less noise.

6) It will not cause a fire and will not pollute the environment. It is less affected by temperature changes.

PARKER Proportional Valve Structure and Principle:

When the input signal of the PARKER proportional valve increases, the pilot valve 1 of the supply solenoid valve switches, while the exhaust solenoid pilot valve 7 is in the reset state. The supply pressure then enters the pilot chamber 5 from the SUP port through valve 1. The pilot chamber pressure rises, and the air pressure acts on the diaphragm 2, causing the supply valve core 4 connected to the diaphragm 2 to open, while the exhaust valve core 3 closes, generating output pressure. This output pressure is fed back to the control loop 8 through the pressure sensor 6. Here, a rapid comparison and correction is performed with the target value until the output pressure is proportional to the input signal, thus obtaining the condition that the output pressure changes proportionally to the change in the input signal. Because it lacks a nozzle-baffle mechanism, the valve is insensitive to impurities and has high reliability.

PARKER proportional valves actually have many disadvantages: high energy consumption, prone to failure, poor resistance to contamination, high price, etc. Their only advantage is their highest dynamic performance among all hydraulic valves. This single advantage makes servo valves necessary in many applications with high dynamic performance requirements, such as aircraft and rocket steering mechanisms and turbine speed regulation. For applications with lower dynamic requirements, proportional valves are generally preferred.

Generally speaking, servo systems are mostly closed-loop control, while proportional valves are mostly used for open-loop control. Secondly, proportional valves come in more types, including proportional pressure and flow control valves, offering more flexible control than servo valves. Internally, servo valves often have zero overdrive, while proportional valves have a certain dead zone, resulting in lower control accuracy and slower response. However, looking at development trends, especially in proportional flow control valves and servo valves, the performance difference between the two is gradually narrowing. Furthermore, proportional valves are significantly cheaper than servo valves and have stronger resistance to contamination!

PARKER Proportional Valve In-Stock List, PARKER Solenoid Valve In-Stock List

D41FHE01C2NB00

D41FHE02C1NE00

D41FHB32C2NB00

D41FHE01E1NE00

D41FHB31F2NB00

D41FHE01F4NB00

D41FHE01F1NE00

D41FHB31E1NE00

D41FHB31F1NE00PARKER

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FM3DDDSVPARKER

FM3DDSVPARKER

CPOM3DDVPARKER

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D41FBE01FC1NF0010 PARKER

D41FBE01FC4NF0010 PARKER

D41FBE02FC1NF0010 PARKER

D91FBE01HC1NF0010PARKER

D31FBE01CC1NF00 PARKER

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D3W004CNJW42 PARKER

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DG 34PARKER

DG 35PARKER

DG 365PARKER The company primarily deals in European and American brands, and can source brands from any European country. For example, its key German brands include: BURKERT, DEMAG, HAWE, REXROTH, HYDAC, PILZ relays, FESTO, IFM sensors, E+H, HEIDENHAIN, P+F sensors, SICK, TURCK, HIRSCHMANN industrial switches, Henschler, MURR, SCHMERSAL, SAMSON, and EPRO (a subsidiary of Emerson).

American brands include MOOG, ASCO solenoid valves, MAC solenoid valves, NUMATICS, PARKER pneumatics and hydraulics, VICKERS, and ROSS.

British brands include Norgren. Italian brands OMAL, ATOS, CAMOZZI, UNIVER, and Camozzi.