BURKERT 20110212 (Type 2920) is a manually operated 2/2-way angle seat valve consisting of a manual actuator and a 2-way body made of high-quality stainless steel. With a flow-optimised 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.

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.

Model Specifics

The specific model 20110212 features a 1 1/2" internal thread (G) connection, a 45 mm handwheel, PTFE seat seal, and is rated for 0-16 bar operating pressure at medium temperatures from -10 °C to 200 °C.

Product Features

• High flow rates
• Long service life
• Robust actuator with optional stroke limitation and locking
• Flow-optimised stainless steel valve body with threaded connection

Materials

Depending on the application, the soft PTFE or PEEK seal ensures a reliable valve seat seal, even under challenging operating conditions.

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

Product properties
Design	Angle seat valve on/off
Flow direction	Flow to open (below seat)
Nominal pressure	PN 25 (DIN EN 1333), Class 150 (DIN EN 1759)
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, alkalis, organic solvents
Viscosity	Max. 600 mm²/s
Ambient temperature	-10 °C...+60 °C
Installation position	As required, preferably with actuator upright

Dimensions

Actuator

Note: Dimensions in mm, unless otherwise stated.

Body with Threaded Connection

Nominal diameter (pipe)	G (DIN ISO 228-1), NPT (ASME B 1.20.1), Rc (ISO7-1)
DN	D	E (G)	E (NPT)	E (Rc)	CM	LM
15	14	13.7	13.2	24	65	27
20	16	14.0	14.5	27	75	34
25	18	16.8	16.8	29.5	90	41
32	16	17.3	19.1	36	110	50
40	18	17.3	19.1	35	120	55
50	24	17.6	23.4	45	150	70
65	26	23.7	26.7	57	185	85
80	28	-	-	71	220	100

Function and Operation

Position Indicator

When turning the handwheel anticlockwise, the reproducible stroke scale becomes visible between the position indicator and the handwheel. The scale on the handwheel determines the rotation position of the handwheel (50 positions). The reproducible stroke scale shows, depending on the bottom edge of the handwheel, the relative position of the valve (valve opening) and acts as a fixation point for determining the rotation position.

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.

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. As a category 2 device suitable for zone 1/21 and zone 2/22.
• Drinking Water: Suitable for use in drinking water applications. The materials comply with the assessment principles (UBA) for materials in contact with drinking water (TrinkwasserV).
• Foods and Beverages/Hygiene: FDA, USP, EC Regulation 1935/2004, and China food GB Standards compliance available for specific variable codes.

Safety Instructions

WARNING

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.

DANGER

Explosion hazard due to electrostatic charge! If there is a sudden discharge of electrostatically charged devices or individuals, there is a risk of explosion in the Ex area. Take appropriate measures to ensure that no electrostatic charge can build up. Only wipe the device surfaces gently with a damp or anti-static cloth. Ground the actuator and valve body.