BURKERT 20008721 (Type 2060) pneumatically operated 2/2-way angle seat valve is designed to fulfil the demands of tough process environments. Unrivalled lifetime and sealing integrity are guaranteed by the trusted self-adjusting packing gland. The stainless steel actuator has been developed for demanding applications, featuring laser welding that ensures it is both cleanable and robust. With a ducted exhaust air port, the actuator can be operated isolated from the environment to guarantee optimum lifetime and hygiene. High flow rates are attained with the flow-optimized stainless steel angle seat body.

Features and Benefits

• Flow-optimized stainless steel body with welded connections
• Trusted components for maximum service life
• Stainless steel actuator suitable for demanding environments
• High seal tightness due to self-adjusting packing gland
• Actuator can be seamlessly rotated by 360°

Control Functions

Control Function A (CF A)

Flow direction below seat Normally closed by spring force.

Material Specifications

No.	Element	Material
1	Transparent cover	Optical position indicator Polysulfone PSU
2	Pilot air ports	Threaded bushing G 1/8" Stainless steel 1.4404 (316L)
5	Actuator casing	Stainless steel 1.4404 (316L)
6	Piston seal	FKM
10	Packing gland	PTFE V-Rings (filled), with spring compensation
11	Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
14	Seat seal	PTFE
15	Valve body	Stainless steel CF3M

Dimensions

Actuator

(Dimensions in mm, unless otherwise stated)

Body with Welded Connection

Nominal diameter	DIN EN ISO 1127 / ISO 4200 / DIN 11866 series B
DN 40	ES: 26, CS: 49, LS: 160, Ø DS: 48.3, WS: 2.0

Performance Specifications

Fluidic Data for Flow Below Seat

• Kv value (water): 41 m³/h (for DN 40)
• Operating pressure max: 25 bar (depending on actuator size and pilot pressure)
• Pilot pressure: 5.0 - 10.5 bar

Operating Limits

In addition to the maximum operating pressures, the operating range of Bürkert process valves is limited by the nominal pressure according to the relevant standard (e.g., PN 25, Class 150).

Installation and Safety

Risk of injury from high pressure

Before working on the system or device, switch off the pressure and vent or empty the lines. Installation may only be performed by qualified and trained personnel.

• Ensure that pipelines are in alignment and remove soiling from pipelines.
• Note flow direction (see type label).
• The position of the ports can be seamlessly aligned by turning the actuator 360°. The valve must be in the open position when the actuator is rotated.