Burkert Type 2101 (Model 20111562) is a pneumatically operated 2/2-way globe valve ELEMENT designed for decentralised process automation. It meets practical requirements even under difficult operating conditions. Its unique design allows for the easy integration of automation units in all expansion stages, from electrical/optical position feedback to pneumatic control and integrated fieldbus interfaces. 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, IP65/67 protection classes, and high resistance to chemicals.

Features

• Compact design
• Long service life
• Easy integration of automation units with ELEMENT
• Stainless steel valve body with flange connection
• Suitable for steam, water, neutral gases, alcohols, oils, fuels, hydraulic fluids, and organic solvents

General Technical Data

Property	Value
Design	Globe valve
Safety setting in case of power failure	Normally closed (control function A)
Flow direction	Against closing direction (below seat), with closing direction (above seat)
Operating pressure	0 bar(g)...25 bar(g) (Model 20111562: 0-16 bar)
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
Medium temperature	-40 °C...+230 °C (Model 20111562: -10 °C to 200 °C)
Ambient temperature	-10 °C...+100 °C
Degree of protection	IP65/67

Structure and Function

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. Depending on the variant, the valve seat is closed in the direction of or against the medium flow.

Flow Direction Below Seat

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). As the medium is present under the swivel plate, the operating pressure contributes to the opening of the valve.

WARNING

Valve leak if there is too little minimum pilot pressure or high operating pressure! Minimum pilot pressure for CFB and CFI that is too low, or failing to meet the permitted operating pressure, can cause a leak in the valve seat.

• Adhere to minimum pilot pressure.
• Do not exceed the operating pressure.

Flow Direction Above Seat

The valve is closed with the medium flow via spring force (control function A, CFA). Because the operating pressure is above the swivel plate, it helps the valve close and also contributes to sealing the valve seat. The valve opens via pilot pressure.

DANGER

Risk of injury from pressure surge. A pressure surge could cause lines and the device to burst. Because of the risk of pressure surge, valves with the flow direction above the seat must not be used for fluid media.

• Observe the type of flow and type of medium for operating the device.

Materials

Element	Material
Actuator cover	PPS
Actuator casing	Stainless steel 1.4561 (316Ti)
Piston seal	FKM
Spring	Stainless steel 1.4310
Spindle packing	PTFE V-Rings (filled), with spring compensation
Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
Swivel plate	Stainless steel 1.4401 (316)/1.4404 (316L)
Seat seal	PTFE, PEEK (option)
Valve body	Stainless steel 316L / CF3M

Basic Safety Instructions

DANGER

Risk of injury due to high pressure in the system or device.

• Before working on the system or device, switch off the pressure and ventilate or empty the lines.

Risk of injury due to electric shock (with installed electrical components).

• Before working on the device or system, switch off the power supply. Secure against reactivation.

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.

TIP

Discharge of medium if packing gland worn.

• Relief bore must be regularly inspected for any medium leakages.
• If medium is leaking from the relief bore, the packing gland must be replaced.