The Burkert Type 2100 angle seat valve is specially optimized for decentralized process automation and fulfills the tough criteria in process environments. 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 characterized by its compact and smooth design, integrated pilot air ducts, protection classes IP65/67, NEMA Type 4X, and high resistance to chemicals.

Key Features

• High flow rates
• Long service life
• Easy integration of automation units with ELEMENT
• Flow-optimized stainless steel valve body with sleeve, clamp, or weld connection
• Suitable for steam, water, neutral gases, alcohols, oils, fuels, hydraulic fluids, salt solutions, alkalis, and organic solvents

Control Functions and Flow Direction

The device uses neutral gases or air to control the flow rate of liquid or gaseous media. The closing force is transferred by a spindle connected to the actuator piston.

• Control function A (CFA): Pneumatically operated 2/2-way on/off valve. Normally closed by spring force.
• Control function B (CFB): Pneumatically operated 2/2-way on/off valve. Normally opened by spring force.
• Control function I (CFI): Pneumatically actuated on/off valve on both sides. Rest position not defined (unpressurised).

Flow Direction Below the Seat

Only use flow direction below the seat for liquid media, gases, and vapours. As the medium is present under the swivel plate, the operating pressure contributes to the opening of the valve.

Flow Direction Above the Seat

Only use flow direction above the seat for gases and vapours, and for valves with control function A (closed by spring force in rest position). As the medium is present above the swivel plate, the operating pressure contributes to the closing of the valve. The operating pressure also supports the sealing of the valve seat.

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.

Materials

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

Note

The lubricants for the packing gland and actuator are classified according to NSF H1.

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.

Safety and Installation Instructions

CAUTION

Medium under pressure: Medium under pressure can seriously injure people. In the event of overpressure or pressure surges, the device or lines can burst. Before working on the device or system, switch off the pressure. Vent or empty the lines.

Contaminated pilot air: The control exhaust air of the device can be contaminated with lubricants. Dissipate control exhaust air appropriately. Only use fresh air for generating compressed air for the device.

EXPLOSION HAZARD (ATEX Variants)

If the device is used in a potentially explosive atmosphere (Zones 1/21 and 2/22), ensure that static electricity cannot accumulate. Ground the actuator and the valve body. If a plastic valve body is used, ground the actuator separately. Only use cleaning agents certified for explosive environments.