BURKERT 377821 (Type 2101) is a pneumatically operated 2/2-way globe valve ELEMENT designed for decentralised process automation. It features a G1 1/2 internal thread connection, a 40 mm nominal seat diameter, and operates with a flow direction below the seat. The valve is equipped with a self-adjusting V-seal packing gland for maximum service life and high seal tightness. The highly integrated system of valve and automation unit is characterised by its compact design, integrated pilot air ducts, and high resistance to chemicals.

Features

• Compact design and smooth surface
• Long service life and high seat tightness due to swivel plate
• Easy integration of automation units with ELEMENT
• Stainless steel valve body with internal thread connection
• Suitable for steam, water, neutral gases, alcohols, oils, and aggressive media

Control Function

This model operates with Control function A (CF A): Pneumatically operated 2/2-way on/off valve, flow direction below seat, normally closed by spring force.

WARNING

Valve leak if there is too little minimum pilot pressure or high operating pressure! Minimum pilot pressure 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.

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). Spring force generates the closing force on the swivel plate. A spindle connected to the actuator piston transmits the force. As the medium is present under the swivel plate, the operating pressure contributes to the opening of the valve.

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)
Swivel plate	Stainless steel 1.4401 (316) / 1.4404 (316L)
Seat seal	PTFE
Valve body	Stainless steel 316L / CF3M

Approvals and Conformities

• Explosion Protection: ATEX / IECEx (II 2G Ex h IIC T4…T2 Gb / II 2D Ex h IIIC T135 °C…T300 °C Db)
• Foods and Beverages/Hygiene: FDA, USP, EC Regulation 1935/2004 compliant
• Drinking Water: Suitable for use in drinking water applications (UBA)

ATEX / IECEx Safety

When used in a potentially explosive area, ensure the device is grounded. For plastic valve bodies, ground the actuator separately. Only wipe the device surface with a damp or anti-static cloth to prevent electrostatic charging.

DANGER

Risk of injury from high pressure in the system or device. Before working on the system or device, switch off the pressure and ventilate or empty the lines.