3/2 way seat valve C3 DN3 PN480 ATEX

3/2 way seat valve C3 DN3 PN480 ATEX

Features

Function of 3/2-way valve

The force (1), generated by the actuation, acts through the lever (2), the tappet (3) on the ball(s) (4) and presses it out of the right valve seat (5) and into the left valve seat (5). This is used to connect lines P and A and shut off line T, see Example. The covers (6) support the flange seals from the inside and limit the volume flow to the admissible value.

The 3/2-way valve is provided with a “negative overlap”. During the changeover process, connections P, A and T are briefly connected with each other. The changeover occurs so fast that the hydraulic effects are negligible. By design, a 3/2-way valve always requires the connection of a T-connector; only then a proper switching function can be ensured.

Depending on the design of the valve insert a valve with the basic position “A→T NO” (lines A and T are connected) or “P→A NO” (lines P and A are connected) is provided.

2/2 way seat valve C3 DN25 – 150 PN320

2/2 way seat valve C3 DN25 – 150 PN320

Features

Function of 2/2-way valve

The valve piston (2) guided within the valve body (1) is pressed into the valve seat (3) by the hydraulic power generated by the control pressure (X) on the closing area (5), provided the opening area (6) is depressurised by the pilot valve (4). Thus, the lines (A, B) are separated. By switching the pilot valve (4), also the opening area (6) of the valve piston (2) is pressurised and lifts off the valve seat (3), the valve piston (2) moves into the opened position up to the mechanical end position and to the stroke limitation (7). Thus, the lines (A, B) are connected. Control channel (Z) is assigned to the closing area and control channel (X) to the opening area. The valve can be opened and closed actively by means of control pressure (X, Y), independent of the pressure along the work lines (A, B). The area ratios “opening area/closing area” and “closing area/cable area (A, B)”, ensure a safe opening and closing of the valve. Depending on the design of the pilot valve (4), the basic valve position normally closed (NC) or normally open (NO) is provided. The position of the valve piston (2) can be monitored by the proximity switch (8).

Control surfaces, hydraulic forces
A channel: Area A1, open valve passively
B channel: Area A2, open valve passively
Control surface (6): A3, open valve actively
Control surface (5): A4, close valve actively

2/2 way seat valve C3 DN16 – 100 PN500

2/2 way seat valve C3 DN16 – 100 PN500

Features

Function of 2/2-way valve

The valve piston (2) guided within the valve body (1) is pressed into the valve seat (3) by the hydraulic power generated by the control pressure (X) on the closing area (5), provided the opening area (6) is depressurised by the pilot valve (4).Thus, the lines (A, B) are separated. By switching the pilot valve (4), also the opening area (6) of the alve piston (2) is pressurised and lifts off the valve seat (3), the valve piston (2) moves into the opened position up to the mechanical end position and to the stroke limitation (7). Thus, the lines (A, B) are connected. The valve can be opened and closed actively by means of control pressure (X, Y), independent of the pressure along the work lines (A, B). The area ratios “open- ing area/closing area” and “closing area/cable area (A, B)”, ensure a safe opening and closing of the valve. Depending on the design of the pilot valve (4), the basic valve position normally closed (NC) or normally open (NO) is provided. The position of the valve piston (2) can be monitored by the proximity switch (8).

Control surfaces, hydraulic forces
A channel: Area A1, open valve passively
B channel: Area A2, open valve passively
Control surface (6): A3, open valve actively
Control surface (5): A4, close valve actively

2/2 way seat valve C3 DN12 – 125 PN320

2/2 way seat valve C3 DN12 – 125 PN320

Merkmale

Funktion 2/2-Proportionalsitzventil

The valve piston (2) guided within the valve body (1) is pressed into the valve seat (3) by the hydraulic power generated by the control pressure (X) on the closing area (5), provided the opening area (6) is depressurised by the pilot valve (4).Thus, the lines (A, B) are separated. By switching the pilot valve (4), also the opening area (6) of the alve piston (2) is pressurised and lifts off the valve seat (3), the valve piston (2) moves into the opened position up to the mechanical end position and to the stroke limitation (7). Thus, the lines (A, B) are connected. The valve can be opened and closed actively by means of control pressure (X, Y), independent of the pressure along the work lines (A, B). The area ratios “open- ing area/closing area” and “closing area/cable area (A, B)”, ensure a safe opening and closing of the valve. Depending on the design of the pilot valve (4), the basic valve position normally closed (NC) or normally open (NO) is provided. The position of the valve piston (2) can be monitored by the proximity switch (8).

Control surfaces, hydraulic forces
A channel: Area A1, open valve passively
B channel: Area A2, open valve passively
Control surface (6): A3, open valve actively
Control surface (5): A4, close valve actively