BURKERT 307409 (Type 2301) is a pneumatically operated 2-way globe control valve designed to fulfill tough criteria for process environments. This specific model features a DN 65 flange connection, a stainless steel body, and a PTFE seat seal, making it suitable for pressures up to 25 bar and medium temperatures from -10 °C to +130 °C. The valve operates with Control Function A (normally closed by spring force) and is CIP/SIP capable, meeting stringent hygiene and explosion protection standards including ATEX, IECEx, and Food (EC) 1935/2004.

Unrivaled cycle life and sealing integrity are guaranteed by the proven self-adjusting spindle packing with exchangeable V-seals. 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.

Key Features

• Excellent control characteristics: Equal-percentage flow characteristic (linear characteristic curve on request).
• High cycle life: Maintenance-free operation with self-adjusting spindle packing.
• Flow optimized body: Constructed in stainless steel (316L / CF3M).
• Removable valve seats: Several Kvs values per port size are possible.
• Direct integration: Control units can be mounted directly without external tubing.

General Technical Data

Property	Value
Design	Globe control valve
Safety setting	Normally closed (control function A)
Flow direction	Flow to open (below seat)
Operating pressure	0...25 bar(g) (40 bar(g) on request)
Nominal pressure	PN 25/PN 40 (DIN EN 1333), Class 150 (DIN EN 1759)
Seat leakage	Leakage class VI for PTFE and PEEK; Class III and IV for stainless steel
Theoretical rangeability	50:1
Medium	Steam, water, neutral gases, alcohols, oils, fuels, hydraulic fluids, salt solutions, organic solvents, oxygen, fuel gases, hydrogen (optional)
Medium temperature	-40 °C...+230 °C (Model 307409 specific: -10 °C to +130 °C)
Viscosity	Max. 600 mm²/s
Control medium	Air, neutral gases (Instrument air as per DIN ISO 8573-1 Class 3/5)
Degree of protection	IP65/67

Control Functions and Flow Direction

The valve seat is always closed against the medium flow. Spring force (CFA) or pneumatic pilot pressure (CFB and CFI) generate the closing force on the control cone. Because the medium pressure is below the control cone, it helps open the valve.

• Control function A (CF A): Pneumatically operated 2/2-way control valve. Flow direction below seat. Normally closed by spring force.
• Control function B (CF B): Pneumatically operated 2/2-way control valve. Flow direction below seat. Normally opened by spring force.
• Control function I (CF I): Actuating function via reciprocal pressurisation.

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.

Material Specifications

No.	Element	Material
1	Pilot air ports	Push-in connector PP
2	Actuator cover	PPS
3	Actuator casing	Stainless steel 1.4561 (316Ti)
4	Piston seal	FKM
5	Spring	Stainless steel 1.4310
7	Packing gland	PTFE V-Rings (filled), with spring compensation
8	Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
10	Body seal	Graphite or PTFE
11	Control cone	Stainless steel 1.4571 (optionally hardened)
13	Seat seal	PTFE (Model 307409), PEEK, or Stainless steel
15	Valve body	Stainless steel 316L / CF3M

Approvals and Conformities

• Explosion Protection: ATEX II 2G Ex h IIC T4…T2 Gb / II 2D Ex h IIIC T135 °C…T300 °C Db; IECEx Ex h IIC T4…T2 Gb / Ex h IIIC T135 °C…T300 °C Db.
• Foods and Beverages/Hygiene: FDA, USP, EC Regulation 1935/2004, China food GB Standards.
• Drinking Water: Materials comply with the assessment principles (UBA) for materials in contact with drinking water.
• Others: DNV GL classification, Oxygen suitability, Fuel gases (CE), Hydrogen suitability, TA Luft.

DANGER

Explosion Hazard due to Electrostatic Charge! If the device is used in a potentially explosive area (Zones 1/21 or 2/22), appropriate measures must be taken to ensure that electrostatic charges cannot accumulate. Ground the actuator and valve body. Only wipe the device surfaces gently with a damp or anti-static cloth.

Installation and Pneumatic Connection

DANGER

Risk of injury from high pressure in the system! Before loosening lines and valves, turn off the pressure and vent the lines.

WARNING

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.

Any installation position of the globe control valve is possible, preferably with the actuator facing upward. Ensure that pipelines are aligned before connecting the valve and note the flow direction (flow direction always below seat).

Connect the control medium to the pilot air port (3–7 bar; instrument air, oil-, water- and dust-free). Install the exhaust air line or a silencer onto the exhaust air port. For usage in an aggressive environment, it is recommended to use a pneumatic hose to drain all free pneumatic ports in a neutral atmosphere.

Product Accessories

The Type 2301 Globe Control Valve can be combined with an extensive range of positioners and process controllers to form the Continuous ELEMENT valve system, Type 8802-GD. Compatible control units include:

• Type 8692 / 8693: Digital electropneumatic positioner / process controller for integrated mounting.
• Type 8694 / 8696: Compact digital electropneumatic positioner (BASIC).
• Type 8792 / 8793: Electropneumatic positioner / process controller SideCONTROL with remote sensor Type 8798.
• Type 8791: Electropneumatic positioner SideCONTROL BASIC with remote sensor.