BURKERT 20076149 (Type 2961) is a manually operated 2-way globe control valve designed for excellent control accuracy under demanding operating conditions. The valve consists of a manual actuator and a globe valve body with exchangeable seats made of high-quality stainless steel. The precise spindle guide enables reliable control, while a hardened stainless steel seat seal guarantees dependable shut-off. The actuator is made of high-quality PPS plastic, suitable for demanding environments, and features a visual position indicator.

Technical Data

Feature	Specification
Design	Globe control valve
Port Connection	3" Internal thread (G)
Flow Direction	Flow to open (below seat)
Operating Pressure	0 bar(g) ... 16 bar(g)
Nominal Pressure	PN 25 (DIN EN 1333), Class 150 (DIN EN 1759)
Medium Temperature	-10 °C ... +185 °C
Ambient Temperature	-10 °C ... +60 °C
Kv Value (Water)	100 m³/h
Operating Characteristic	Equal percentage 50:1
Actuator Material	PPS (Polyphenylene sulphide)
Handwheel Diameter	160 mm (Size L)

Materials

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	Stainless steel, hardened valve seat
12	Valve seat with O-ring	Stainless steel 1.4571, EPDM
13	Valve body	Stainless steel 316L/CF3M

Dimensions

Actuator

Dimensions in mm, unless otherwise stated.

Nominal connection size (pipe)	Handwheel diameter ∅	H1	H2 (locking)
DN 80 / NPS 3	160 (L)	369	375

Body with Threaded Connection

Dimensions in mm, unless otherwise stated.

DN	NPS	G (DIN ISO 228-1)	NPT (ASME B1.20.1)	RC (ISO 7-1)	LM	AF
80	3	28	30.5	29.8	205	100

Performance Specifications

Flow Characteristics

Flow characteristic according to DIN EN 60534-2-4. Equal percentage flow curve.

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.

Product Design and Assembly

Position Indicator

When turning the handwheel anticlockwise, the reproducible stroke scale becomes visible between the attachment and the handwheel. The scale on the handwheel, together with the stroke scale, enables reproducible adjustment of the flow rate.

Stroke Limitation (Optional)

Both the minimum and the maximum position of the valve can be adjusted via an adjustment sleeve. The handwheel can be removed for this purpose.

Interlock (Optional)

The valve can be secured against unintentional or unauthorized operation. For this purpose, a securing pin can be pressed down and turned. The locking pin has a hole (∅ 3.8) and can be secured with a padlock.

Installation and Operation

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

Risk of crushing by mechanically powered parts The upwards and downwards movement of the device means there is a risk of crushing. Do not reach into the openings of the valve body.

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.

TIP

Tightening Torques The following tightening torques must not be exceeded for the handwheel sizes: S: 7 Nm; M: 15 Nm; L: 30 Nm.