BURKERT Type 2300 (SKU 369471) is a pneumatically operated 2-way angle seat control valve designed for liquid and gaseous media. It features a stainless steel body with a G1 internal thread, a 25 mm nominal seat diameter, and a flow rate (Kv value) of 16 m³/h. The valve operates within a pressure range of 0 to 25 bar and a medium temperature range of -10 °C to 185 °C. It utilizes a normally closed (NC) control function A and requires a pilot pressure of 5.5 to 7 bar.

The construction of the Type 2300 angle-seat valve fulfills criteria for process environments. Cycle life and sealing integrity are supported by a self-adjusting packing gland. The parabolic trim provides a flow characteristic approximately 35% larger than conventional control valves. The design enables the integration of automation modules, including digital electropneumatic positioners or process controllers.

Control Functions

The valve seat is always closed against the medium flow.

• Control function A (CFA): Closed by spring force in rest position.
• Control function B (CFB): Opened by spring force in rest position.
• Control function I (CFI): Actuating function via reciprocal pressurisation.

Risk of pilot pressure failure

With control function I, the control unit and reset are pneumatic. No defined position is reached during a pressure failure. To ensure a controlled restart of the device, first apply pilot pressure and then activate the medium.

Approvals and Conformities

• Explosion protection: ATEX (II 2G Ex h IIC T4...T2 Gb, II 2D Ex h IIIC T135 °C...T300 °C Db) and IECEx.
• Foods and beverages/Hygiene: FDA, USP, EC Regulation 1935/2004, China food GB Standards.
• Drinking water: Materials comply with assessment principles (UBA).
• DNV GL classification: Accepted for installation on vessels classed by DNV GL.

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	Stainless steel 1.4571, PTFE or PEEK
14	Valve body	Stainless steel CF3M

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 control cone is modularly connected to the actuator spindle via a spring-type straight pin. The flow direction is always below the valve seat.

Because the medium pressure is below the control cone, it helps open the valve.

Valve leak risk

Minimum pilot pressure for CFB and CFI that is too low, or failing to meet the permitted medium pressure, can cause a leak in the valve seat. Adhere to minimum pilot pressure and do not exceed the medium pressure.

Operating Conditions

The operating range is limited by the nominal pressure according to the relevant standard.

Actuator size [mm]	Actuator material	Medium (Seat seal Steel)	Medium (Seat seal PTFE)	Environment
50, 70, 90, 130	PPS	-10 to +230 °C	-10 to +130 °C	-10 to +60 °C / -10 to +100 °C

Installation

When installing the actuator, the valve must be in the open position to prevent damage to the seat seal or seat contour.

DN	Tightening torque [Nm]
15	45 ± 3
20	50 ± 3
25	60 ± 3
32, 40	65 ± 3
50	70 ± 3
65	100 ± 3