The BURKERT Type 2920 angle seat valve consists of a manual actuator and a 2-way body made of high-quality stainless steel. With a flow-optimized valve body, the manually operated valve offers diverse usage options to shut off both neutral and aggressive gaseous and liquid media. The tried-and-tested self-adjusting packing gland guarantees optimal tightness and therefore enables low-maintenance operation, even at high switching cycles. Depending on the application, the soft PTFE or PEEK seal ensures a reliable valve seat seal, even under challenging operating conditions.

The actuator is made of high-quality plastic and is suitable for use in demanding environments. It possesses a visual position indicator and can be optionally equipped with stroke limitation and locking.

Variants

Types 2920, 2921, 2960 and 2961 differ due to the valve body and the control cone.

Type	Nominal diameter DN	Valve body	Properties
2920	10 to 80	Angle seat body	Without control cones; for pure shut-off function
2960	10 to 65	Angle seat body	With control cone; with position indicator and scale to set a defined flow rate
2921	10 to 100	Globe body	Without control cones; for pure shut-off function
2961	10 to 100	Globe body	With control cone; with position indicator and scale to set a defined flow rate; with screwed-in valve seat that can be replaced to reduce the seat size

Approvals and Conformities

• Pressure Equipment Directive: 2014/68/EU
• Explosion Protection (Optional): ATEX / IECEx (Zone 1/21 and Zone 2/22). EPS 18 ATEX 2 008 XII 2G Ex h IIC T4...T2 Gb / II 2D Ex h IIIC T135 °C...T300 °C Db.
• Drinking Water: Suitable for use in drinking water applications. Materials comply with UBA assessment principles.
• Foods and Beverages/Hygiene: FDA (Code of Federal Regulations), USP (United States Pharmacopeial Convention), EC Regulation 1935/2004, and China food GB Standards.

Materials

No.	Element	Material
1	Cover	Polyamide (PA)
2	Screw	Stainless steel 1.4301
3	Lock pin	Stainless steel 1.4305
4	Handwheel	Polyphenylene sulfide (PPS)
5	Optical position indicator with scale	Polyamide (PA)
6	Packing gland	PTFE V-rings (filled), with spring compensation
7	Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
8	Spindle guide	DN 15...DN 50: PEEK; DN 65...DN 80: Stainless steel 1.4401 (316)/1.4404 (316L)
9	Body seal	Graphite
10	Swivel plate	Stainless steel 1.4401 (316)/1.4404 (316L)
11	Seat seal (optional)	PTFE or PEEK
12	Valve body	Stainless steel 316L/CF3M

Technical Data

• Operating medium: Steam, water, neutral gases, alcohols, oils, fuels, hydraulic fluids, salt solutions, alkalis, organic solvents
• Medium temperature: -40 °C...+230 °C
• Ambient temperature: -10 °C...+60 °C
• Viscosity: Max. 600 mm²/s
• Installation position: As required, preferably with actuator upright

Dimensions

Actuator

Body with Threaded Connection

Body with Welded Connection

Body with Clamp Connection

Performance Specifications

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.

Operating limits for optional variants:

• High-temperature variant: Suitable for applications with steam, neutral gases and other heat transfer medium 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: Materials comply with UBA assessment principles for drinking water up to +85 °C.
• Low-temperature variant: Suitable for minimum medium temperatures down to -40 °C.

Installation and Operation

DANGER

Risk of injury due to high pressure and escaping medium Switch off the pressure before working on the device or system. Vent or drain the lines.

WARNING

Risk of crushing by mechanically powered parts Do not reach into the openings of the valve body.

Position Indicator

When turning the handwheel anticlockwise, the reproducible stroke scale becomes visible between the position indicator and the handwheel.

INFO

The visibility of the stroke scale is not directly correlated with the closed position of the valve. Depending on the valve design, the repeatable stroke scale may not be visible when the valve is open, or be visible when the valve is closed.

Flow Direction

The valve seat is always closed against the medium flow. The flow direction should therefore be set such that the valve reaches the flow beneath the valve seat.

Set Stroke Limit (Optional)

Setting the minimum and maximum stroke limit is possible as an option. An adjusting sleeve is used for this purpose.

Lock Handwheel (Optional)

It is also an option to lock the handwheel to prevent unintentional or unauthorised operation of the valve. The locking pin has a bore (Ø 3.8) and can be secured against unauthorised use with a padlock.