BC片式多路阀的应用

点击数：16272014-07-12 22:04:54　

The sectional valves of the BC series are characterized by the following features:

• Possibility to install on each port auxiliary valves such as relief valves (VL), 

anti-cavitation valves (VC) or combined relief and anti-cavitation valves (VLC)

• Possibility of having non-return valves on each section, to avoid any interference 

between the elements

• Possibility to control the flow and the simultaneous operations of two or more 

sections through flow control sections (RF) or the sections with integrated pressure 

compensated flow control (CF patented).

Above features grant such a high flexibility and a large number of combinations to enable BC valves 

to meet the standards of high efficiency required by modern mobile machines. 

 


Adjustable pressure compensated flow control sections (RF)

The adjustable pressure compensated flow control section (RF) divides the flow circulating 

in the by-pass channel (By) into two lines:

• The first, priority flow (PF) is adjustable with the external knob
• The second, exceeding flow (EF), gets the exceeding oil, not used by the priority line

The combination of the various types of RF (three) with different types of special elements (P-R-PR) 

allows the execution of many circuits, samples of which are reported hereunder. The use we want to 

do of the priority (PF) and of the exceeding (EF) flows, will determine the choice of the flow divider 

and the special elements that we hereby list. 

 

EXAMPLE 1

The motor (A) is fed by the whole flow of the pump (P). The cylinders (C, D) downstream the flow control element (RFS) are fed only by the priority flow (PF) which is adjustable through the flow control knob on the element. The excess flow go to the tank.

EXAMPLE 2

The motors (A, B) are fed by the priority flow (PF) which is adjustable through the flow control knob on the element. The cylinders (C, D) are fed by the whole flow of the pump (P) when singly actuated. When a cylinder and a motor are simultaneously actuated, the motor is fed by the priority flow (PF) and the cylinder by the exceeding flow (EF). If a cylinder is actuated while a motor is in work, this last will not vary its rotation speed.

EXAMPLE 3

The motor (A) is fed by the exceeding flow (EF). The priority flow (PF) goes to tank. As the quantity of oil sent to the tank is constant, whenever the pump flow changes the motor’s rotation speed will vary.

EXAMPLE 4

The motors (A, B) are fed by the priority flow (PF) of two CF elements which, having the flow control integrated, allow to adjustment the rotation speed one by one. The exceeding flow (EF)is recuperated into the by-pass channel and therefore it is available for the following elements. The cylinders (C, D) are fed by the whole flow of the pump (P) when singly actuated. When a motor (or both) and a cylider are simultaneously actuated, the cylinder is fed only by the exceeding flow (EF).

EXAMPLE 5

The cylinder (C) is fed by the whole flow of the pump (P). The motor (A) is fed by the priority flow (PF) which is adjustable through the flow control knob on the element. The exceeding flow (EF) is recuperated into the by-pass channel so that it allows the contemporaneous usage of another valve downstream by adding a CO plug.