Page 205 - Bürkert

2/2-way Ball Valve with pneumatic rotary actuator, plastic body

2658

• Radially expandable body
• Pneumatic actuator in compact model
• Optical position indicator 2 (A)
• Safe blocked union nuts with Dual
1 (P)
®
Block Technology 1)
2 (A)

1 (P)

The complete unit of Type 2658 consists of a pneumatic rotary actuator Envelope Dimensions [mm] (see datasheet for details)
and a ball valve body from plastic. The connection between the ball valve
and the actuator is made via a standard interface (flange connection).
The rotary movement in the actuator is produced by a linear piston with
angled thread coupling. The rotary actuator moves the ball valve through
90° and thereby opens or closes the port cross-section. The compact
pneumatically-operated ball valve can be used for a wide range of ap- A
plications and medium. The pneumatic rotary actuator can also be used
for other purposes.

Special feature
The ball valves are equipped with the so-called Dual Block® Technology.
This system serves as a safety device for the union nuts. It prevents them
separating during operation.
B
Technical Data
Orifice DN10-50
Body material PVC-U (PP, PVDF, PVC-C, ABS on request)
Actuator material PA (polyamide, glass-fibre reinforced) C
Pilot air ports material Stainless steel
Seal material
O-rings EPDM, FKM
Ball seal PTFE DN A B C D
Medium Gaseous and liquid medium, which do not 15 63 39 122 56
attack the body and seal materials 20 80 52 148 80
Medium temperature
PVC body 0 to +60° C
Ambient temperature -10 to +60 °C
Port connections
PVC-U True union
(PP, PVDF on request) Fusion spigot
Control medium Neutral gases, air
Pilot pressure
Single-acting actuator 5 - 10 bar (Ø 63 mm)
5 - 6 bar (Ø 100 mm)
Double-acting actuator 2 - 10 bar (Ø 63 mm)
2 - 6 bar (Ø 100 mm)
Rotation 90° ±3°
Rotation time for 90° 1 to 3.5 s (depending on load and pilot
pressure)
Connection between actuator Flange acc. to ISO 5211 and DIN 3337
and ball valve
Installation As required, preferably with actuator upright
1 Dual Block® Technology is a registered trademark of FIP - Formatura Iniezione Polimeri p.p.A

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