BURKERT Type 3321 is an innovative process on/off valve designed for 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, reacting almost instantaneously to process signals. If necessary, the safety position can be approached by an optional energy storage (SAFEPOS energy-pack) in case of power failure. The electromotive actuator and shut-off valve are adapted perfectly to each other with a closed design and robust surface, ensuring 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 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

Product properties	Value
Design	Globe on/off valve
Nominal diameter	DN 15...DN 100, NPS 1/2...4
Safety setting in case of power failure	With 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: -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
Kv value	4.7...165 m3/h
Closing time	AG2: 2.3...6.6 s. AG3: 8.7 s
Travel speed	6 mm/s (AG2 1300 N), 4 mm/s (AG2 2500 N), 3 mm/s (AG3 7700 N and 10000 N)
Operating voltage	24 V DC ± 10 % (maximum residual ripple 10 %)
Fieldbus (digital)	Bürkert system bus (büS) (standard), CANopen (optional), EtherNet/IP, PROFINET, Modbus TCP, EtherCAT (optional via integrated gateway)
Medium temperature	-40 °C...+ 230 °C
Ambient temperature	-25 °C...+65 °C (only without additional modules)
Degree of protection	IP65/IP67 (DIN EN 60529), NEMA 4X

Approvals and Conformities

• Explosion protection: ATEX / IECEx (Category 3 device suitable for zone 2/22. Ex ec IIC T4 Gc, Ex tc IIIC T135 °C Dc).
• North America: UL Listed for the USA and Canada (UL 61010-1).
• Drinking water: Suitable for use in drinking water applications (TrinkwasserV, up to +85 °C).
• Foods and beverages/Hygiene: FDA, USP, EC Regulation 1935/2004, China food GB Standards.
• Others: Suitability for oxygen (up to 25 bar(g) and +60 °C), TA Luft.

Materials

Actuator Materials:

• Blind cover/gateway housing: PPS (standard), stainless steel 1.4301 (for ATEX/IECEx)
• Actuator cover: PPS (AG2) / PC (AG3)
• Actuator housing: Powder-coated aluminium
• Actuator base: PPS (AG2) / Stainless steel 1.4308 (AG3)

Valve Body Materials:

• Spindle: Stainless steel 1.4401 (316)/1.4404 (316L)
• Spindle seal: PTFE V-seals (filled) with spring compensation
• Valve seat seal: PTFE or PEEK seal washer
• Valve body: Stainless steel CF3M

Dimensions

Actuator Dimensions

Product Connections

Electrical Connection

The actuator position is controlled according to the digital input. The selection is made either by an external standard signal or via a fieldbus (digital). The device features 1 digital input and 2 digital outputs.

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 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 valve position can be changed manually in 2 ways: either via the electrical manual control or via a mechanical manual override if no supply voltage is available.

Service and Maintenance

WARNING

Risk of injury from high pressure. Before working on the system or device, switch off the pressure and vent or drain lines.

DANGER

Risk of injury from discharge of medium and release of pressure. It is dangerous to remove a device which is under pressure due to the sudden release of pressure or discharge of medium. Before removing a device, switch off the pressure and deaerate lines.

Changing the Swivel Plate Set

1. Support swivel plate on the cylindrical part using a prism.
2. Knock out dowel pin using a suitable pin punch.
3. Remove swivel plate.
4. Place new swivel plate on the spindle.
5. Align holes in the swivel plate with holes in the spindle.
6. Position dowel pin and carefully knock in using a hammer.
7. Center the dowel pin relative to the spindle axis.

Changing the Packing Gland

1. Place the open-end wrench on the body connection. Unscrew spindle guide with the aid of a modified socket wrench.
2. Place spindle on a firm base.
3. Pressurize relief bore with approx. 6 bar compressed air to press out the packing gland package.
4. Grease gaskets of the new packing gland package with the supplied lubricant.
5. Place the individual parts on the spindle in the prescribed direction and sequence.
6. Push packing gland into the packing gland tube.
7. Grease spindle guide thread with Klüber paste UH1 96-402 and screw in spindle guide.