Burkert Type 2101 pneumatically operated 2/2-way globe valve is specially optimised for decentralised process automation and meets all practical requirements even under difficult operating conditions. Its unique design allows easy integration of automation units in all expansion stages, from electrical/optical position feedback to pneumatic control and integrated fieldbus interface. Maximum service life and tightness are achieved by the proven self-adjusting v-seal packing gland. The highly integrated system of valve and automation unit is characterised by its compact and smooth design, integrated pilot air ducts, protection classes IP65/67, NEMA Type 4X and high resistance to chemicals.

General Technical Data

Product properties	Details
Design	Globe 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	Against closing direction (below seat), with closing direction (above seat)
Operating pressure	0 bar(g)...25 bar(g), 40 bar(g) on request. Vacuum variants...-0.9 bar(g)
Nominal pressure	PN 25/PN 40 (DIN EN 1333), Class 150 (DIN EN 1759)
Pilot pressure	2.5 bar(g)...10 bar(g)
Seat leakage	Leakage rate A (DIN EN 12266-1), seat seal PTFE and PEEK, test medium air
Kv value	4.7 m³/h...140 m³/h
Operating 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...+100 °C

Control Functions

WARNING

Risk of damage due to bursting pipes and bursting equipment when the flow is above the seat. In the case of liquid mediums, water hammer can occur causing pipes and the device to burst. Do not use valves with flow above the seat for liquid mediums.

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

Structure

The globe valve consists of a pneumatically actuated piston actuator and a 2-way body. The actuator is made from polyphenylene sulphide (PPS) or stainless steel (for actuator size 225).

Materials

Element	Material
Actuator cover	PPS
Actuator casing	Stainless steel 1.4561 (316Ti)
Piston seal	FKM
Spindle packing	PTFE V-Rings (filled), with spring compensation
Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
Seat seal	PTFE, PEEK (option)
Valve body	Stainless steel 316L / CF3M

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.

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 packing gland increases service life significantly.
• Drinking water variant: Wetted materials are tested for suitability with drinking water up to +85 °C.
• 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.
• Oxygen variant: Non-metallic wetted materials are tested for suitability with oxygen and are suitable for operating pressures up to 25 bar(g) and medium temperatures up to +60 °C.
• Hydrogen variant: Wetted materials are tested for suitability with hydrogen and are suitable for operating pressures up to 40 bar(g) and medium temperatures up to +100 °C.