BURKERT 20063956 (Type 2300) pneumatically operated 2-way angle seat control valve fulfills tough criteria for process environments. Unrivalled cycle life and sealing integrity are guaranteed by the proven self-adjusting packing gland. The parabolic trim results in a flow characteristic approximately 35% larger than conventional control valves. This specific model features a durable PTFE seal for tight shut-off, a stainless steel body, and a weld end connection (DN 65).

The design enables the easy integration of automation modules whether they are digital electropneumatic positioners or process controllers. The fully integrated system has a compact and smooth design, integrated pneumatic lines, IP65/67 protection class, and superior chemical resistance. This system has been engineered for reliable accurate control in applications where high flow rate is an advantage.

Structure and Function

The angle-seat control valve consists of a pneumatically operated piston actuator, a control cone, and a 2/2-way angle-seat valve body. The valve seats are directly integrated, and the flow direction is always below the valve seat.

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

Approvals and Conformities

• Conformity: Pressure Equipment Directive 2014/68/EU, Machinery Directive 2006/42/EC.
• Explosion Protection: ATEX / IECEx (Optional, valid for variable code PX51). As a category 2 device suitable for zone 1/21 and zone 2/22.
• Foods and Beverages/Hygiene: FDA, USP, EC Regulation 1935/2004.
• Others: DNV GL classification, Suitability for oxygen, TA Luft.

Materials

No.	Element	Material
1	Pilot air ports	Push-in connector PP (standard)
2	Actuator cover	PPS
3	Actuator casing	Stainless steel 1.4561 (316Ti)
4	Piston seal	FKM
5	Spring	Stainless steel 1.4310
6	Pipe	Stainless steel CF3M
7	Packing gland	PTFE V-rings (filled), with spring compensation
8	Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
9	Spindle guide	Stainless steel 1.4404 (316L)
10	Body seal	Graphite or PTFE
11	Control cone	Stainless steel 1.4571
12	Spring pin	Stainless steel 1.4310
13	Seat seal	PTFE
14	Valve body	Stainless steel CF3M

Dimensions (Weld End)

Dimensions for DN 65 (DIN EN ISO 1127 / ISO 4200 / DIN 11866 series B):

• ES: 26 mm
• CS: 50 mm
• LS: 210 mm
• Ø DS: 76.1 mm
• WS: 2.3 mm

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.

Basic Safety Instructions

• Risk of injury from high pressure: Before working on the system or device, switch off the pressure and vent or empty the lines.
• Risk of injury when opening the actuator: The actuator contains a spring under tension. When the actuator is opened, the spring will jump out and may cause injuries. Do not open the actuator.
• Risk of burns: Risk of burns or fire from hot device surfaces due to prolonged operation. Only touch the device when wearing protective gloves.