BURKERT 387641 (Type 2060) pneumatically operated 2/2-way angle seat valve with stainless steel actuators fulfils the demands of tough process environments. Unrivalled life time and sealing integrity is guaranteed by the trusted self-adjusting packing gland. The stainless steel actuator has been designed for tough applications. Laser welding ensures it is both cleanable and robust. With a ducted exhaust air port, the actuator can be operated isolated from the environment to guarantee an optimum life time and hygiene. High flow rates are attained with the optimised stainless steel angle seat body.

• Flow optimised stainless steel body with various line connections
• Trusted components for the longest life time
• Stainless steel actuator suitable for demanding environments
• Modular accessory program with stroke limitation and position feedback available

General Technical Data

Product properties
Design	Angle seat valve
Nominal diameter	DN 10...DN 80, NPS 3/8...NPS 3
Safety setting	Normally closed (control function A), normally open (control function B)
Flow direction	Flow to open (below seat), flow to close (above seat)
Operating pressure	0 bar(g)...25 bar(g), vacuum variants...-0.9 bar(g) (option)
Nominal pressure	PN 25 (DIN EN 1333), Class 150 (DIN EN 1759)
Pilot pressure	2...10.5 bar(g) (Actuator size B: 2...7 bar(g))
Seat leakage	Leakage rate A (DIN EN 12266-1), seat seal PTFE and PEEK, test medium air
Kv value	1.6...140 m3/h
Medium	Steam, water, neutral gases, alcohols, oils, fuels, hydraulic fluids, salt solutions, alkalis, organic solvents
Medium temperature	-40...+230 °C
Viscosity	Max. 600 mm2/s
Control medium	Air, neutral gases
Ambient temperature	-10...+130 °C
Degree of protection	IP65/67
Installation position	As required, preferably with actuator upright

Control Functions

WARNING

Risk of damage due to bursting pipes and bursting equipment when the flow is above the seat. In the case of liquid mediums, water hammer can occur causing pipes and the device to burst. Do not use valves with flow above the seat for liquid mediums.

• Control function A (CF A): Pneumatically operated 2/2-way on/off valve. Flow direction below seat. Normally closed by spring force.
• Control function B (CF B): Pneumatically operated 2/2-way on/off valve. Flow direction below seat. Normally opened by spring force.
• Control function A (CF A) above seat: Pneumatically operated 2/2-way on/off valve. Flow direction above seat. Normally closed by spring force.

Approvals and Conformities

INFO

The approvals and conformities listed below must be stated when making enquiries. This is the only way to ensure that the product complies with all required specifications.

• Explosion protection: Optional (valid for the variable code PX51). As a category 2 device suitable for zone 1/21 and zone 2/22. ATEX: EPS 18 ATEX 2 008 X II 2G Ex h IIC T4...T2 Gb / II 2D Ex h IIIC T135 °C...T300 °C Db. IECEx: IECEx EPS 18.0007X.
• Drinking water: Suitable for use in drinking water applications. The materials comply with the assessment principles (UBA) for materials in contact with drinking water (TrinkwasserV).
• FDA: All wetted materials are compliant with the Code of Federal Regulations published by the FDA (Food and Drug Administration, USA).
• EC Regulation 1935/2004: All wetted materials are compliant with EC Regulation 1935/2004/EC.
• DNV GL classification: The products are accepted for installation on all vessels classed by DNV GL.

Materials

Actuator size 50 (D), 70 (M), 90 (N), 130 (P)

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)
3	Spring support	Stainless steel 1.4308
4	Spindle extension	Stainless steel 1.4104
5	Actuator casing	Stainless steel 1.4404 (316L)
6	Piston seal	FKM
7	Actuator base (interface)	Stainless steel 1.4308
8	Spring	Stainless steel 1.4310
9	Pipe	Stainless steel 1.4401 (316)/1.4404 (316L)
10	Packing gland	PTFE V-Rings (filled), with spring compensation
11	Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
12	Spindle guide	PTFE (filled) for actuator size 50(D) / PEEK for actuator size 70(M), 90(N), 130(P)
13	Swivel plate	Stainless steel 1.4401 (316)/1.4404 (316L)
14	Seat seal	PTFE, PEEK (optional), NBR (optional), FKM (optional)
15	Valve body	Stainless steel CF3M

Dimensions

Actuator

Body with threaded connection

Body with welded connection

Body with clamp connection

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.

Derating the operating pressure as per DIN EN 12516-1/PN25

Temperature	Operating pressure
-10 – +50 °C	25 bar
100 °C	24.5 bar
150 °C	22.4 bar
200 °C	20.3 bar
230 °C	19 bar

DANGER

Risk of injury from high pressure in the system. Before working on the system or device, switch off the pressure and vent or empty the lines.