Burkert Type 2301 (SKU 367421) is a pneumatically operated 2-way globe control valve designed to fulfil tough criteria for process environments. Unrivalled cycle life and sealing integrity is guaranteed by the proven self-adjusting spindle packing with exchangeable V-seals. Each globe valve body can be fitted with up to five sizes of trim sets. These parabolic trims provide a reliable and repeatable characteristic to vary the flow. 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.

Features

• Excellent control characteristics
• High cycle life and maintenance-free operation
• Flow optimised body in stainless steel
• Several Kvs value per port size due to removable valve seats
• Control units can be mounted directly without external tubing

General Technical Data

Property	Value
Design	Globe control valve
Nominal diameter	DN 10...DN 100, NPS 3/8...NPS 4
Safety setting	Normally closed (control function A), normally open (control function B)
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)
Medium	Steam, water, neutral gases, alcohols, oils, fuels, hydraulic fluids, salt solutions, organic solvents, oxygen and fuel gases
Medium temperature	-40 °C...+230 °C
Ambient temperature	-10 °C...+80 °C (depending on positioner/controller)
Degree of protection	IP65/67

Materials

Element	Material
Actuator cover	PPS
Actuator casing	Stainless steel 1.4561 (316Ti)
Packing gland	PTFE V-Rings (filled), with spring compensation
Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
Control cone	Stainless steel 1.4571 (optionally hardened)
Valve body	Stainless steel 316L / CF3M

Control Functions

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. A spindle connected to the actuator piston transmits the force.

• 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.

Flow Direction Below Seat

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

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.

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.