Burkert Type 2101 pneumatically operated 2/2-way globe valve ELEMENT 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.

Features:

• Compact design
• Long service life
• Easy integration of automation units with ELEMENT
• Stainless steel valve body with flange, sleeve or welded connection
• Suitable for steam

General Technical Data

Product properties	Description
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) (option)
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
Operating 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 °C...+ 100 °C
Degree of protection	IP65/67
Installation position	As required, preferably with actuator in upright position

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 (for actuator size 225).

Control Functions

Depending on the variant, the valve seat is closed in the direction of or against the medium flow. Spring force (CFA) or pneumatic pilot pressure (CFB and CFI) generate the closing force on the swivel plate.

• Control function A (CFA): Closed by spring force in rest position.
• Control function B (CFB): Opened by spring force in rest position.
• Control function I (CFI): Actuating function via reciprocal pressurisation.

WARNING

For control function I – risk of pilot pressure failure. With control function I, the control unit and reset are pneumatic. No defined position is reached during a pressure failure. To ensure a controlled restart of the device, first apply pilot pressure and then activate the medium.

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 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 and do not exceed the operating pressure.

Flow Direction Above Seat

The valve is closed with the medium flow via spring force (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.

WARNING

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 liquid mediums.

Approvals and Conformities

• Explosion protection: EPS 18 ATEX 2 008 X II 2G Ex h IIC T4…T2 Gb / II 2D Ex h IIIC T135 °C…T300 °C Db. IECEx EPS 18.0007X.
• Drinking water: Suitable for use in drinking water applications (UBA).
• Foods and beverages/Hygiene: FDA, USP, EC Regulation 1935/2004, China food GB Standards.
• Others: DNV GL classification, Suitability for oxygen, Fuel gases (CE), Hydrogen, TA Luft.

Materials

Element	Material
Actuator cover	PPS (Ultrason S for stainless steel variant)
Actuator casing	Stainless steel 1.4561 (316Ti) or 1.4308
Piston seal	FKM
Spindle packing	PTFE V-Rings (filled), with spring compensation
Spindle	Stainless steel 1.4401 (316) / 1.4404 (316L)
Body seal	Graphite, PTFE (option)
Swivel plate	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: Recommended for water temperatures starting at +85 °C up to +200 °C.
• Vacuum variant: Without leakage bore, suitable for pressures down to -0.9 bar(g).
• Low-temperature variant: Suitable for minimum medium temperatures down to -40 °C.
• Oxygen/Hydrogen variants: Tested for suitability with oxygen/hydrogen, suitable for operating pressures up to 40 bar(g) and medium temperatures up to +100 °C.

Installation Notes

ATTENTION

Loose screw connection of the valve body connection with high mechanical stress or in applications with increased temperatures. If the pipeline is subject to high mechanical stress (vibrations) or in applications with temperatures above 140 °C, the screw connection on the valve body connection must be checked before installation and regularly during operation.

Turning Actuator

The position of the ports can be seamlessly aligned by turning the actuator 360°.

WARNING

Risk of injury from discharge of pressure and escaping medium. The body connection can loosen when rotated incorrectly. Only turn the actuator in the specified direction (counterclockwise seen from below). When turning the actuator, the valve must be in the open position.

Attaching a sensor or fitting to the relief bore

The optional variant for leak detection and discharge allows for the connection of a sensor or a fitting to the relief bore. Do not attach any closed vessels to the relief bore. Ensure that there is no back pressure that could hinder the flow of the leakage. Otherwise there is a risk of operating medium entering the actuator and causing permanent damage to it.

Maintenance

When used in accordance with these operating instructions, the actuator of the globe valve is maintenance-free. Parts which are subject to natural wear are seals and the swivel plate. If medium is leaking from the relief bore, the packing gland must be replaced.