American PARKER proportional valve structure principle

Brand

PARKER/American Parker

Features of PARKER proportional valves (USA):

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

2) Enables remote and program control.

3) Simplifies the system and greatly reduces the number of components compared to intermittent control.

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

5) Low power consumption, low heat generation, and low noise.

6) Does not cause fires and does not pollute the environment. Less affected by temperature changes.

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 straight-through valves, solenoid directional valves, and electro-hydraulic directional valves. Another type is continuous control: the valve port can be opened 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 or servo valves is to achieve flow throttling control electronically (of course, pressure control can also be achieved through structural modifications). Since it is throttling control, there will inevitably be 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 Structure and Principle (USA)

When the input signal of a Parker proportional valve increases, the supply solenoid pilot valve 1 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 diaphragm 2 to open, and the exhaust valve core 3 to close, generating output pressure. This output pressure is fed back to the control circuit 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 demonstrating that the output pressure changes proportionally to the change in the input signal. Because there is no nozzle-baffle mechanism, the valve is insensitive to impurities and has high reliability.

PARKER Proportional Valve Stock List (USA)

D91FBE01HC1NF0010 PARKER

D31FBE01CC1NF00 PARKER

D31FHE02C1NB00 PARKER

D3W004CNJW42 PARKER

D3W001CNJW42 PARKER

DG 34 PARKER

DG 35 PARKER

DG 365 PARKER

D41FHE01C2NB00

D41FHE02C1NE00

D41FHB32C2NB00

D41FHE01E1NE00

D41FHB31F2NB00

D41FHE01F4NB00

D41FHE01F1NE00

D41FHB31E1NE00

D41FHB31F1NE00 PARKER FM2DDSVPARKER

FM3DDDSVPARKER

FM3DDSVPARKER

CPOM3DDVPARKER

CPOM2DDVPARKER

FM2DDKVPARKER

FM3DDKVPARKER

Our company mainly deals in European and American brands and can source brands from any European country. For example, our 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, Hengstl, MURR, SCHMERSAL, SAMSON, and EPRO (a subsidiary of Emerson). MOOG (USA), ASCO (USA), MAC (USA), NUMATICS (USA), PARKER (USA), VICKERS (USA), ROSS (USA)

Norgren (UK)

OMAL (Italy), ATOS (Italy), CAMOZZI (Italy), UNIVER (Italy), Camozzi (Italy)