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Valvole direzionali

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TYPE 4WEH

4WEH

Valves of type WEH are directional spool valves with electrohydraulic operation. They control the start, stop and direction of a fluid flow. The directional valves basically consist of the main valve with housing, main control spool, one or two return springs, and the pilot valve with one or two solenoids "a" and/or "b". The main control spool in the main valve is held in the neutral or in the initial position either by the springs or by means of pressure. In the initial position, the two spring chambers and are connected to the tank without pressure via the pilot valve. The pilot valve is supplied with pilot fluid via the pilot line. The pilot oil supply can be either internal or external (external via port X). When the pilot valve is operated, e.g. solenoid "a", the pilot spool is shifted to the left and thus spring chamber is pressurized with pilot pressure. Spring chamber remains un-pressurized. The pilot pressure acts on the left side of the main control spool and pushes it against the spring. As a consequence, the ports P to B and A to T are connected in the main valve. When the solenoid is de-energized, the pilot spool returns to its initial position (exception: detented spool). The spring chamber is unloaded to tank. The pilot oil is expelled from the spring chamber via the pilot valve into the Y channel. The pilot oil supply and drain are internal or external (external via port Y). An optional manual override permits pilot spool to be operated without energizing the solenoid.

TYPE 4WH

4WH

Valves of type WH are directional spool valves with hydraulic operation. They control the start, stop and direction of a fluid flow. The directional valves basically consist of the valve housing, the main control spool, one or two return springs and in the case of valves with spring return or spring centring, and the pilot connecting plate. The control spool is operated directly by means hydraulic pressure. The control spool is held in the neutral or in the initial position either by springs or by means of pressure. Pilot oil supply and pilot oil drain are external.

TYPE 5 WE 10

5 WE 10

5-chamber directional valves of type 5 WE are solenoid operated directional spool valves. They control the start, stop and direction of flow with the additional option of adjusting the spool switching time.These directional valves basically consist of the housing, one or two solenoids, the control spool, as well as one or two return springs.The two spring chamber are connected by a connecting bore. As the spool switches, the flow is displaced from one spring chamber to the other via this passage. If the area of this connecting bore is reduced by an orifice, the switching time changes accordingly.The T channels are isolated from the spring chambers. This means that switching pulses do not affect the control spool and thus, soft switching of the spool can be achieved.In the de-energized condition, the control spool is held in the central or initial position by return springs (except for impulse spools). The control spool is actuated by wet pin solenoids.

TYPE B-H10

B-H10

The type B-H10 valves are hand lever actuated directional spool valves. They control the start, stop and direction of a flow. The directional valves basically comprise of a housing, hand lever, control spool, as well as one return springs. In the unoperated condition the control spool is held in the neutral or its initial position by the return springs. The control spool is actuated via the hand lever, this acts via a joint and the pin directly onto the control spool. The spool is thereby moved out of its rest position into its required switched position. After the hand lever has been returned to the switched position zero, the spool is returned to the neutral position via the return springs.

TYPE H WM B

H WM B

The type WMM valves are hand lever actuated directional spool valves. They control the start, stop and direction of a flow. The directional valves basically comprise of a housing, hand lever, control pool, as well as one
or two return springs. In the unoperated condition the control spool is held in the neutral or its initial position by the return springs. The control spool is actuated via the hand lever, this acts via a joint and the pin directly onto the control spool. The spool is thereby moved out of its rest postion into its required switched position. After the hand lever has been returned to the switched position zero, the spool is returned to the neutral position via the return springs.
These valves are either 2 or 3 position directional control valves which are fitted with a detent , which operates in all of the switched positions.

TYPE M SEW 10

M SEW 10

The 2 type M SEW directional valve is a solenoid actuated directional poppet valve.They control the start, stop and direction of a flow. They basically consist of a housing, the solenoids, the hardened valve system and the ball as the closing element.

TYPE M SEW 6

M SEW 6
The 2 type M SEW directional valve is a solenoid actuated directional poppet valve. They control the start, stop and direction of a flow. They basically consist of a housing, the solenoids, the hardened valve system and the balls as the closing element.

TYPE M SR

M SR

The check valve type M-SR has the task of, prefer ably closing a flow in one direction and to permit free flow in the opposite direction. The valve including valve sleeve, spool, spring seat and springs. It is mainly used in the outlet of pump as back pressure and side through valves.

TYPE RVP

RVP

The check valve type RVP has the task of, preferably closing a flow leak free in one direction and to permit free flow in the opposite direction. It basically comprises of the housing, poppet compression spring, and spring seat. The stroke of the poppet, which is guided on its outside diameter, is limited by a mechanical stop. The built-in compression spring supports the closing movement. Furthermore the compression spring holds the poppet in the closed position even when there is no flow through the valve.

TYPE S

S

The check valve type S has the task of, preferably closing a flow leak free in one direction and to permit free flow in the opposite direction. The stroke of the poppet, which is guided on its outside diameter, is limited by a mechanical stop. The built-in compression spring supports the closing movement. Furthermore the compression spring holds the poppet in the closed position even when there is no flow through the valve.

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