BURKERT 20135457 Type 2000 is a pneumatically operated 2/2-way angle seat valve designed for the controlled flow of liquid and gaseous media. This specific model features a stainless steel body, a PA (Polyamide) actuator, and PTFE seat seals. It operates with Control Function B (normally open by spring force) and is designed for flow below the seat, making it highly suitable for high flow rates and demanding industrial environments. The reliable self-adjusting packing gland provides high sealing integrity.

Product Structure

1: Transparent cover with position indicator, 2: Actuator cover, 3: Actuator housing, 4: Relief bore, 5: Port connection, 6: Flow direction marker, 7: Valve body, 8: Valve body connection with wrench flat, 10: Lower pilot air port, 11: Upper pilot air port.

Working Principle

Control Function B (CF B)

The valve is a pneumatically operated 2/2-way on/off valve. In its rest position, it is normally opened by spring force. Pilot pressure applied to the actuator generates the closing force on the swivel plate.

Flow Below Seat

The flow direction is below the seat. Since the medium is located below the swivel plate, the operating pressure contributes to opening the valve. This configuration is suitable for liquids, steam, and gases.

Technical Data

Feature	Specification
Nominal Diameter	25 mm
Valve Body Material	Stainless steel
Actuator Material	PA (Polyamide)
Seat Seal Material	PTFE
Operating Pressure	0 to 25 bar
Pilot Pressure	2 to 10 bar
Medium Temperature	-40 °C to +185 °C
Ambient Temperature	-40 °C to +60 °C
Control Medium	Air, neutral gases

Danger of Bursting and Leaks

If the permitted medium or control pressure is exceeded, lines or the device may leak and burst. For control function B, a too low control pressure may result in leaks. Do not exceed the maximum operating pressure of 25 bar and maximum pilot pressure of 10 bar.

Dimensions

Actuator Dimensions

(Note: Dimensions vary by exact port connection type; refer to the full datasheet for specific thread/weld dimensions).

Installation

• Installation Position: Any position, preferably with the actuator face up.
• Pneumatic Connection: For Control Function B, connect the control medium to the upper pilot air port of the actuator.
• Alignment: The control air connection can be aligned steplessly by rotating the actuator through 360°.