Bürkert Type 3321 electromotive 2/2-way globe valve (on/off) 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.

Product Features

• Safety position via energy storage
• Rapid flow shut off
• Weather and impact resistant design
• Hygienically designed surface
• Versatile diagnostic options

General Technical Data

Product properties	Description
Design	Globe on/off valve
Nominal diameter	DN 15...DN 100, NPS 1/2...4 (Model 322149 is DN 50)
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) (Model 322149 is 0...6 bar)
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 %)
Degree of protection	IP65/IP67 (DIN EN 60529), NEMA 4X

Materials

Actuator Materials (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

Valve Body Materials

No.	Component	Material
1	Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
2	Spindle seal	PTFE V-seals (filled) with spring compensation
3	Spindle guide	PEEK or stainless steel 1.4404 (316L)
4	Packing gland tube	Stainless steel 1.4401 (316)
5	Seal valve body	Graphite or PTFE
6	Swivel plate	Stainless steel 1.4571
7	Valve seat seal	PTFE or PEEK seal washer
8	Valve seat	Stainless steel 1.4571
9	O-ring valve seat	EPDM or PTFE
10	Valve body	Stainless steel CF3M

Dimensions

Body with Flange Connection

INFO

Dimensions in mm, unless otherwise stated. The table below shows DIN EN 1092 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

Fluidic Data

Overview of flow characteristics with 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	10 / 18	10 / 18	31
50	2	1300 / 2500	6 / 10	6 / 10	45
65	2 1/2	10000	-	25	73
80	3	10000	-	17	110
100	4	10000	13.5	10.5	165

TIP

Model 322149 utilizes the AG2 actuator with 1300 N force, providing a maximum operating pressure of 6 bar for DN 50 with a PTFE seat seal.

Product Design and Assembly

The electromotive linear actuator consists of a brushless DC motor, a gear and a spindle system that transfers the force to the closing element. The integrated control electronics are controlled either by standard signals or via a fieldbus (digital). The electromotive linear actuator is designed to provide optimum efficiency. At the same time, it keeps the valve tight and in position even at the maximum specified medium pressure in a powerless standstill.

Design of the Electromotive Valve Type 3321 AG2

Design of the Electromotive Valve Type 3321 AG3