Burkert Type 2006 pneumatically operated 3/2-way seat valve consists of a CLASSIC actuator and a 3-way valve body. The actuator is available in two different materials, PA or PPS, depending on the ambient temperature. Interchanging of pressure and working connections enables different fluidic control functions, such as the mixing or distributing of media. The flow-optimised valve body Type 2006 allows excellent flow values. The tried-and-tested self-adjusting packing gland secures a high level of tightness and thus ensures reliable operation over years. The 3-way valve Type 2006 is controlled by a pilot valve or by centralised automation using a valve island. It can be equipped easily with electrical position feedback. For the user, the compact Type 2006 is thus often an economic alternative instead of two single shut-off valves.

General Technical Data

Product properties
Body material	Stainless steel 316L
Actuator material	PA (PPS on request)
Seal material	PTFE
Packing gland	PTFE V-rings with spring compensation (with silicone grease)
Nominal diameter	DN 15...DN 50, NPS 1/2...NPS 2
Nominal pressure	PN 16 (body)
Pilot pressure	Max 10 bar(g) (7 bar(g) with actuator size Ø 125 mm)
Medium	Steam, water, neutral gases, alcohols, oils, fuels, hydraulic fluids, salt solutions, alkalis, organic solvents, oxygen and fuel gases
Medium temperature	-10 °C...+180 °C
Viscosity	Max. 600 mm²/s
Control medium	Air, neutral gases
Threaded connection	G (DIN ISO 228 - 1), NPT (ASME B1.20.1)
Installation position	As required, preferably with actuator in upright position

Control Functions

Symbol	Description
	Control function C (CF C) Pneumatically operated 3/2-way process valve. When de-energised, pressure port 1 closed, service port 2 exhausted.
	Control function D (CF D) Pneumatically operated 3/2-way process valve. When de-energised, pressure port 3 connected to service port 2, exhaust port 1 closed.
	Control function E (CF E) Pneumatically operated 3/2-way mixer valve. When de-energised, pressure port 3 connected to service port 2, pressure port 1 closed.
	Control function F (CF F) Pneumatically operated 3/2-way distributor valve. When de-energised, pressure port 2 connected to service port 3, service port 1 closed.

Pin Assignment for Flow Modes of Operation C, D, E and F

A, B: Service ports | P, P1, P2: Pressure ports | R: Exhaust port

Flow modes of operation	Connection 1	Connection 2	Connection 3
C	P	A	R
D	R	A	P
E	P1	A	P2
F	A	P	B

Approvals and Conformities

• Explosion protection: ATEX / IECEx (Category 2 device suitable for zone 1/21 and zone 2/22).
• Drinking water: Suitable for use in drinking water applications (TrinkwasserV).
• Foods and beverages/Hygiene: FDA compliance, EC Regulation 1935/2004, China food GB Standards.
• DNV GL classification: Accepted for installation on all vessels classed by DNV GL.
• Oxygen: Optional suitability for use with gaseous oxygen.
• Fuel gases: Complies with Regulation (EU) 2016/426 and DVGW DIN EN 161.

Materials

No.	Element	Material
1	Transparent cap	Polycarbonate (PC) (with PPS actuator: PSU)
2	O-Ring	FKM
3	Actuator	Polyamide (PA) or PPS
4	Pilot air ports G 1/4	Stainless steel 1.4305
5	Piston seal	NBR (with PPS actuator: FKM)
6	Spindle seal	PTFE
7	Pipe	Stainless steel 1.4401 / 316 or 1.4404 / 316L
8	Spring	Stainless steel 1.4310
9	Nipple	Stainless steel 1.4401 / 316 or 1.4404 / 316L
10	Wiper	PTFE / PEEK
11	Valve body	Stainless steel 1.4404 / 316L
12	Spindle	Stainless steel 1.4404 / 316L
13	Seal holder	Stainless steel 1.4404 / 316L
14	Seat seal	PTFE
15	Seat nipple	Stainless steel 1.4404 / 316L

Dimensions

Nominal diameter	Actuator size Ø	Port connection D	A	E	H	T
15	50 (D)	G 1/2	85	64	178	54
15	63 (E)	G 1/2	85	80	220	54
20	50 (D)	G 3/4	85	64	178	54
20	63 (E)	G 3/4	85	80	220	54
25	63 (E)	G 1	105	80	220	54
32	80 (F)	G 1 1/4	130	101	249	68
32	125 (H)	G 1 1/4	130	158	345	68
40	63 (E)	G 1 1/2	130	80	226	68
40	80 (F)	G 1 1/2	130	101	249	68
40	125 (H)	G 1 1/2	130	158	345	68
50	125 (H)	G 2	150	158	352	72

Structure and Function

The globe valve consists of a pneumatically actuated piston actuator and a 3-way valve body. Depending on the version, the lower seat of the valve is closed with or against the medium flow. Spring force (CFA) or pneumatic pilot pressure (CFB and CFI) generates the closing force on the closing body. The force is transferred via a spindle which is connected to the actuator piston.

WARNING

Risk of injury from water hammer. A water hammer could crack the lines and device. ▶ Use valves with flow inlet above seat for gaseous media and steam only.

DANGER

Risk of injury from high pressure in the equipment. ▶ Before dismounting pneumatic lines or valves, turn off the pressure and vent the lines.