The innovative BURKERT Type 3321 process on/off valve is the solution when it comes to shut-off tasks under demanding operating conditions. The electromotive actuator of the globe valve with ball screw moves the swivel plate to the desired end position at a particularly high speed up to 6 mm/s. Thereby it reacts almost instantaneously to process signals. If necessary, the safety position can be approached by an optional energy storage in case of power failure.

The electromotive actuator and shut-off valve are adapted perfectly to each other with closed design and robust surface. This ensures the hygienic requirements of fast and residue-free cleaning. Harsh ambient conditions are no problem for the electromotive globe valve Type 3321 due to the degree of protection IP65/IP67 and the high impact and vibration resistance. Thanks to the tried-and-tested, self-adjusting packing gland with exchangeable V-seals, the globe valve achieves maximum service life and tightness. The fieldbus-compatible Type 3321 shut-off valve offers the operator many helpful functions for process monitoring, valve diagnostics and preventive maintenance.

General Technical Data

Actuator Sizes

• AG2: actuator size 2 with a nominal force of 1300 or 2500 N for seat size 15…50
• AG3: actuator size 3 with a nominal force of 7700 or 10000 N for seat size 40…100

Product properties	Details
Design	Globe on/off valve
Nominal diameter	DN 15...DN 100, NPS 1/2...4
Safety setting in case of power failure	With energy storage SAFEPOS energy-pack: open, closed or freely programmable position. Without energy storage: blocked in last position
Flow direction	Against closing direction (below seat)
Operating pressure	0...25 bar(g) (Vacuum variant down to -0.9 bar(g) optional)
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 voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Protection class	III (DIN EN 61140)
Duty cycle	100 %
Medium temperature	-40 °C...+ 230 °C
Degree of protection	IP65/IP67 (DIN EN 60529), NEMA 4X

Materials

Actuator AG2

No.	Component	Material
1	Blind cover/gateway housing	PPS (standard), stainless steel 1.4301 (for ATEX/IECEx)
2	Actuator cover	PPS
3	Seal	EPDM
4	Actuator housing	Powder-coated aluminium
6	Seal	EPDM
7	Actuator base	PPS

Actuator AG3

No.	Component	Material
1	Blind cover/gateway housing	PPS (standard), stainless steel 1.4301 (for ATEX/IECEx)
2	Actuator cover	PC
3	Seal	EPDM
4	Actuator housing	Powder-coated aluminium
5	Energy storage SAFEPOS energy-pack housing	PC
6	Seal	EPDM
7	Actuator base	Stainless steel 1.4308

Dimensions

Actuator AG2

DN	NPS	H1 Standard variant (mm)	H2 Fieldbus variant (mm)
10	3/8	417	489
15	1/2	417	489
20	3/4	423	495
25	1	427	498
32	1 1/4	448	519
40	1 1/2	452	524
50	2	485	557

Actuator AG3

DN	NPS	H1 Standard variant (mm)	H2 Fieldbus variant (mm)
40	1 1/2	560	632
50	2	566	638
65	2 1/2	620	692
80	3	628	700
100	4	638	710

Performance Specifications

Fluidic Data (Flow below seat)

DN	NPS	Actuator force [N]	Max. operating pressure PTFE [bar(g)]	Max. operating pressure PEEK [bar(g)]	Kv value water [m3/h]
15	1/2	1300	25	25	4.7
20	3/4	1300	25	25	8.1
25	1	1300	25	25	13
32	1 1/4	1300 / 2500	16 / 25	16 / 25	18
40	1 1/2	1300 / 2500 / 7700	10 / 18 / -	10 / 18 / 25	31
50	2	1300 / 2500 / 7700	6 / 10 / -	6 / 10 / 25	45
65	2 1/2	10000	-	25	73
80	3	10000	-	17	110
100	4	10000	13.5	10.5	165

Product Design

Design of the electromotive valve Type 3321 AG2

Design of the electromotive valve Type 3321 AG3

Maintenance and Service

Risk of injury from high pressure

Before working on the system or device, switch off the pressure and vent or drain lines.

Changing the Swivel Plate Set

Before the swivel plate set can be changed, the actuator must be removed from the valve body.

1. Opening valve electrically/mechanically: When removing the actuator from the valve body, ensure that the valve is in the open position. The valve position must be detected on the mechanical position indicator.
2. Remove actuator: Clamp the valve body into a holding fixture. Place a suitable open-end wrench on the body connection and unscrew the actuator off the valve body.
3. Change swivel plate: Support the swivel plate on the cylindrical part using a prism. Knock out the dowel pin using a suitable pin punch. Remove the swivel plate.
4. Install new swivel plate: Place the new swivel plate on the spindle. Align holes, position the dowel pin, and carefully knock it in using a hammer.
5. Install actuator: Replace the graphite seal. Grease the external thread of the body connection. Screw the actuator onto the valve body and observe the specified tightening torques.
6. Run X.TUNE: After installing the actuator, run the X.TUNE function to adjust the position controller to the physical stroke of the actuating element used.