BURKERT Type 2301 pneumatically operated 2-way globe control valve fulfils 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 control cones are available in either stainless steel or with a durable PTFE seal or PEEK seal for tight shut-off. Leakage class III, IV or VI are available. 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
• 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

Product properties	Specification
Design	Globe control valve
Nominal diameter (port connection)	DN 10...DN 100, NPS 3/8...NPS 4
Safety setting in case of power failure	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. Vacuum variant...- 0.9 bar(g) (option)
Nominal pressure	PN 25/PN 40 (DIN EN 1333), Class 150 (DIN EN 1759)
Seat leakage	Leakage class III and IV (DIN EN 60534 - 4:2006) for stainless steel. Leakage class VI for PTFE and PEEK
Operating characteristic	Equal percentage, linear (others on request)
Theoretical rangeability	50:1
Medium	Steam, water, neutral gases, alcohols, oils, fuels, hydraulic fluids, salt solutions, organic solvents, oxygen and fuel gases, Hydrogen (optional), Iyes (optional)
Medium temperature	- 40 °C...+ 230 °C
Viscosity	Max. 600 mm2/s
Control medium	Air, neutral gases
Ambient temperature	- 10...+ 80 °C (with positioner Type 8791/8792/8793), - 10...+ 55 °C (with positioner Type 8692/8693/8694)
Degree of protection	IP65/67
Installation position	As required, preferably with actuator upright

Materials

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
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), PTFE filled
10	Body seal	Graphite or PTFE
11	Control cone	Stainless steel 1.4571 (optionally hardened)
12	Spring straight pin	Stainless steel 1.4310
13	Seat seal	Stainless steel 1.4571 (optionally hardened), PTFE or PEEK
14	Valve seat with o-Ring	Stainless steel 1.4571, EPDM
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) and IECEx.
• Drinking water: Suitable for use in drinking water applications (TrinkwasserV).
• Foods and beverages/Hygiene: FDA, USP, EC Regulation 1935/2004, China food GB Standards.
• Others: DNV GL classification, Oxygen suitability, Fuel gases (Regulation EU 2016/426), Hydrogen suitability, TA Luft.

Operating Limits

Optional Variants

• High-temperature variant: Suitable for applications with steam, neutral gases and other heat transfer mediums up to +230 °C.
• Water variant: For applications with water up to +200 °C, a special configuration of the spindle seal increases service life significantly.
• Vacuum variant: Without leakage bore, this design is suitable for pressures down to -0.9 bar(g).
• Low-temperature variant: Suitable for minimum medium temperatures down to -40 °C.

Structure and Function

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.

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.

DANGER

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.