BURKERT Type 2300 is a pneumatically operated 2-way angle seat control valve designed to fulfill tough criteria for process environments. In line with Bürkert’s philosophy for modular valves and sensors, it offers an excellent combination of good control characteristics and high flow rates. 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. It is available in either stainless steel on stainless steel or with a durable PTFE seal for tight shut-off.

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 a high flow rate is an advantage.

General Technical Data

Product Properties	Description
Design	Angle seat control valve
Nominal diameter	DN 10...DN 65, NPS 3/8...NPS 2 1/2
Safety setting	Normally closed (control function A), normally open (control function B)
Flow direction	Flow to open (below seat)
Operating pressure	0 bar(g)...25 bar(g), vacuum variants...-0.9 bar(g)
Nominal pressure	PN 25 (DIN EN 1333), Class 150 (DIN EN 1759)
Pilot pressure	5.6 bar(g)...7 bar(g)
Seat leakage	DIN EN 60534-4:2006 (Class III/IV for Stainless steel, Class VI for PTFE/PEEK)
Operating characteristic	Modified equal percentage
Process medium	Steam, water, neutral gases, alcohols, oils, fuels, hydraulic fluids, salt solutions, alkalis, organic solvents, and oxygen
Medium temperature	-40 °C...+230 °C
Viscosity	Max. 600 mm²/s
Control medium	Air, neutral gases
Degree of protection	IP65/67

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.
• Drinking Water: Suitable for use in drinking water applications (materials comply with UBA assessment principles).
• Foods and Beverages/Hygiene: FDA compliant, USP biocompatible, EC Regulation 1935/2004 compliant, China food GB Standards compliant.
• DNV GL Classification: Accepted for installation on all vessels classed by DNV GL.
• Oxygen: Suitable for use with gaseous oxygen.
• TA Luft: Compliant with technical instructions on air quality control.

Materials and Structure

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, allowing for quick replacement.

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

Control Functions and Flow Direction

Depending on the variant, the valve is closed against the medium flow either with spring force (Control Function A, CFA) or pilot pressure (Control Function B or I, CFB or CFI). Because the medium pressure is below the control cone, it helps open the valve.

WARNING

Valve leak if there is too little minimum pilot pressure or high medium pressure! 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.

• Control Function A (CFA): Pneumatically operated 2/2-way on/off valve. Flow direction below seat. Normally closed by spring force.
• Control Function B (CFB): Pneumatically operated 2/2-way on/off valve. Flow direction below seat. Normally opened by spring force.
• Control Function I (CFI): Actuating function via reciprocal pressurisation.

Operating Limits

Temperature Ranges

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 / +100 °C (depending on control unit)

Operating Limits for Seat Seal

Tight sealing required	Leakage class (DIN EN 60534-4)	Medium temperature	Seat seal
No (An additional shut-off valve is recommended)	III/IV (metal seals)	-40...+230 °C	Stainless steel
Yes (An additional shut-off valve is often unnecessary)	VI (soft seals)	-40...+130 °C	PTFE
Yes	VI (soft seals)	-10...+230 °C	PEEK

Explosion Protection (ATEX / IECEx)

For devices marked with PX51 (EPS 18 ATEX 2 008 X / IECEx EPS 18.0007 X), the valve actuator is suitable for use as a Category 2 device in Zones 1/21 and 2/22.

DANGER

Risk of explosion due to electrostatic charge! If statically charged devices or persons discharge suddenly, there is a risk of explosion in the potentially explosive area.

• Take appropriate measures to ensure that no electrostatic charge can build up.
• Only clean device surfaces by wiping gently with a damp or anti-static cloth.
• Ground the actuator and the valve body.

Device Grounding:

1. Ground the valve body to the pipeline system using a conductive connection to establish equipotential bonding.
2. Exposed metal parts not integrated into the valve's equipotential bonding (PA) must be included in the PA by the customer via an additional PA connection.
3. Ground conductive parts of the device separately using a grounding strap clip or grounding terminal.