BURKERT Type 2961 (Model 20099319) is a manually operated 2-way globe control valve designed for excellent control accuracy. It consists of a manual actuator and a globe valve body with exchangeable seats made of high-quality stainless steel. The precise spindle guide enables control even under demanding operating conditions. A soft PTFE seal guarantees reliable sealing. 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.

Product Features

• Excellent control accuracy: Exchangeable valve seats enable perfect coordination under the most demanding operating conditions.
• Robust actuator: Features optional stroke limitation and locking.
• High-quality materials: Stainless steel valve body with flange connection (DN 50 for Model 20099319).
• Reliable sealing: The packing gland uses tried-and-tested V-seals and possesses spring compensation, which means that it does not need to be pulled back manually.

Approvals and Conformities

• Pressure Equipment Directive: Compliant with 2014/68/EU.
• Explosion Protection (Optional): ATEX (EPS 18 ATEX 2 008 X II 2G Ex h IIC T4...T2 Gb / II 2D Ex h IIIC T135 °C...T300 °C Db) and IECEx (IECEx EPS 18.0007X). Suitable for zone 1/21 and zone 2/22.
• Drinking Water: Suitable for use in drinking water applications (UBA).
• Foods and Beverages/Hygiene: FDA, USP, EC Regulation 1935/2004, and China food GB Standards compliant variants available.

Explosion Risk in Ex Areas

For variants with Ex approval, there is a risk of explosion due to electrostatic charging. Take appropriate measures to ensure that no electrostatic charge can build up in the potentially explosive area. Only wipe the device surfaces gently with a damp or antistatic cloth. Ground the actuator and valve body.

Material Specifications

No.	Element	Material
1	Cover	Polyamide (PA)
2	Screw	Stainless steel 1.4301
3	Locking device	Stainless steel 1.4305
4	Handwheel	Polyphenylene sulphide (PPS)
5	Visual position indicator with scale	Polyamide (PA)
6	Packing gland	PTFE V-rings (filled), with spring compensation
7	Stem	Stainless steel 1.4401 or 1.4404
8	Spindle guide	Stainless steel 1.4404 (316L), PTFE filled
9	Housing seal	Graphite
10	Control cone	1.4571 (optionally hardened)
11	Seat seal (optional)	PTFE or PEEK
12	Valve seat with O-ring	Stainless steel 1.4571, EPDM
13	Valve body	Stainless steel 316L/CF3M

Dimensions

Body with Flange Connection

Dimensions in mm, unless otherwise stated. Nominal diameter DIN EN 1092-1 PN 25 FTF 1 according to DIN EN 558-1.

DN	∅ DF	LF	∅ BF	AF	∅ D	A x α	∅ MF
15	95	130	65	16	14	4 × 90°	18.1
20	105	150	75	18	14	4 × 90°	23.7
25	115	160	85	18	14	4 × 90°	29.7
32	140	180	100	18	18	4 × 90°	38.4
40	150	200	110	18	18	4 × 90°	44.3
50	165	230	125	20	18	4 × 90°	56.3
65	185	290	145	22	18	8 × 45°	66.0
80	200	310	160	24	18	8 × 45°	81.0
100	235	350	190	24	22	8 × 45°	100.0

Structure and Function

1. Handwheel with locking (optional)
2. Position indicator
3. Relief bore
4. Wrench flat for open-end wrench
5. Globe body
6. Port connection
7. Flow direction indicator

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.

Installation

Risk of injury due to high pressure

Switch off the pressure before working on the device or system. Vent or drain the lines.

Set Stroke Limit

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

1. Screw on handwheel
2. Square
3. Adjusting sleeve

Lock Handwheel

It is also an option to lock the handwheel to prevent unintentional or unauthorised operation of the valve. Handwheel sizes M and L can be locked in 13 locking positions per revolution.

The locking pin has a bore (Ø 3.8) and can be secured against unauthorised use with a padlock (not included in scope of delivery). Push the locking pin down and rotate by 180°. Insert padlock through the bore in the locking pin and secure.

Servicing and Maintenance

When used in accordance with the operating instructions, the actuator of the manually operated valve is maintenance-free. Perform a visual inspection of the device once per year. If leaks occur, replace the respective wearing part. Muddy and abrasive media require correspondingly shorter inspection intervals.