Introduction Directional control valves Nonreturn valves Flow control valves Pressure control valves Shutoff valves Combinational valves 32 Roller lever valve, internal pilot, normally closed 32 way directional valve With air pressure pilot operation 32 way directional valve Normally closed 32 way directional valve Normally closed with disc seat principle (poppet valve) 32 way directional valve Normally open 32 way directional valve Seat valve, with air pilot operation 32 way directional valve Spool valve 32 way directional valve Hand slide valve Air operated shut off valves with a rubber pinching hose inside to stop and control the flow, have become a priority in industries where safety is paramount. Used commonly as their design is simplistic and straightforward, allowing the industries to adopt it without any additional training for employees or controllers.
Pneumatic & Hydraulic Technology Pneumatic Valves CONTENTS Introduction Directional control valves Non-return valves Flow control valves Pressure control valves Shut-off valves Combinational valves 1)Introduction The range of pneumatic valves is vast To help select a valve they are placed in a variety of categories: ● ● ● ● ● ● ● Style Type Design principle Type of operator Function Size Application 1)Introduction ● For all of them, their basic function is to switch air flow ● From the simplest function of switching a single flow path On and Off, to the exacting proportional control of pressure and flow ) Directional control valves ● Categorised ○ Poppet valves ■ ■ ○ Ball seat valve Disc seat valve Slide valves ■ ■ ■ longitudinal slide valve longitudinal flat slide valve plate slide valve ) Directional control valves ➔ Type of valves ● 2/2 - way valve ● 3/2 - way directional control valve ● 4/2 - way directional control valve ● 5/2 - way directional control valve ● Seals in spool valves 2/2 - way direction valve ● ports positions ● sign: 3/2-WAY DIRECTIONAL VALVE ● 3/2 - Roller lever valve, internal pilot, normally closed ● 3/2 - way directional valve With air pressure pilot operation ● 3/2 - way directional valve Normally closed ● 3/2 - way directional valve Normally closed with disc seat principle (poppet valve) ● 3/2 - way directional valve Normally open ● 3/2 - way directional valve Seat valve, with air pilot operation ● 3/2 - way directional valve Spool valve ● 3/2 - way directional valve Hand slide valve 4/2 - way directional control valve ● 4/2 - way directional control valve, air pilot actuated ● 4/2 - way directional control valve, slide valve ● 4/2 - way directional control valve with roller lever and internal pilot valve ● 4/2 - way valve, disc seat ● 4/3 - way directional control valve, rotary slide valve 5/2 - way directional control valve ● 5/2 - way directional control valve, spool valve, compressed air actuated Rapid exhaust valve ● Sign: ● Uses for fast ventilation of cylinders and pipes 4) Flow Control Valves Throttle Valves , Bi-directional Flow control - check valves Throttle Valves , Bi-directional -The throttle valve is a flow control valve -Flow control valves influence the volumetric flow of the compressed air in both directions -Using for speed control of cylinders Flow control - check valves -In non-return valves (one direction valve) compressed air can only flow in one direction through a port which can be set by a screw -The adjustable port permits flow control from up to the nominal width of the valve -These valves are used for speed regulation of actuators and if possible, should be mounted directly on the cylinder 5) Pressure Control Valves Pressure control valves are elements which predominantly influence the pressure or are controlled by the magnitude of the pressure Pressure Sequence Valve Pressure Regulator With Relief Port Pressure Sequence Valve -It is installed in pneumatic controls where a specific pressure is required for switching operation -If the pressure exceeds that set on the spring, the valve opens -The flow from to is closed Outlet is opened only if a preset pressure has built up in pilot line 12 A pilot spool opens the passage to Pressure Regulator With Relief Port -Reduce high input pressure to a low output pressure -They prevent the maximum permissible pressure in a system from being exceeded -The output pressure is adjustable and is nearly kept constant It provides compensation of overload in system, using mainly as safety valves -The set screw permits adjustment of the initial tension in the spring 6) Shut-off valves Shut-off valves, cocks Safety and Effectiveness in industry Shut-off valves, cocks ● Shut off valves are used for shutting off pneumatic devices or pneumatic circuits ● Air may flow in both directions Safety and Effectiveness in industry Air operated shut off valves with a rubber pinching hose inside to stop and control the flow, have become a priority in industries where safety is paramount Used commonly as their design is simplistic and straightforward, allowing the industries to adopt it without any additional training for employees or controllers Industry application Pneumatic shut-off valve type BVK-P 7) Combinational valves Time delay valve ● Components of different control groups can be combined into the body of one unit with the features, characteristics and construction of a combination of valves ● These are referred to as combinational valves and their symbols represent the various components that make up the combined unit ● The following units can be defined as combinational valves: The following units can be defined as combinational valves: ● ● Time delay valves: for the delay of signals Air control blocks: for the execution of individual and oscillating movements using double-acting cylinders ● 5/4-way valve: for the stopping of double-acting cylinders in any position ■ ■ ■ ■ ■ Air operated 8-way valve: for the control of feed units Pulse generator: for the execution of rapid cylinder movements Vacuum generator with ejector: for pick and place applications Stepper modules: for sequential control tasks Command memory modules: for startup with signal input conditions ... Effectiveness in industry Shut-off valves, cocks ● Shut off valves are used for shutting off pneumatic devices or pneumatic circuits ● Air may flow in both directions Safety and Effectiveness in industry... Sequence Valve Pressure Regulator With Relief Port Pressure Sequence Valve -It is installed in pneumatic controls where a specific pressure is required for switching operation -If the pressure... valves Pressure control valves Shut-off valves Combinational valves 1)Introduction The range of pneumatic valves is vast To help select a valve they are placed in a variety of categories: ● ●