250 Series PFEIFFER Electric and Pneumatic Control Valves

SAMSON control valves Series 250 Control Valves

Series 250 Control Valves are used when large valve sizes and/or high pressures are involved in process engineering, power plant or supply engineering.

They are manufactured in valve sizes DN 15 to 500 (NPS ½ to 20) and pressure ratings of PN 16 to 400 (Class 150 to 2500). In addition to globe, three-way and angle valves, customized valve constructions can be engineered.

Standard versions of the valves are suitable for temperature ranges between -10 and +220 °C (15 and 430 °F). The temperature range can, however, be extended by using an adjustable high-temperature packing to a temperature range between -10 and +350 °C (15 and 660 °F) and by using a bellows seal or an insulating section to a temperature range between -196 and +550 °C ( -325 and +1022 °F).

Series 250 Valves can be equipped with a heating jacket.

Series 250 Type 3251-1 and Type 3251-7 Pneumatic Control Valves 

Type 3251 Globe Valve DIN and ANSI versions

Application 

Control valve for process engineering applications with high industrial requirements 

Nominal size DN 15 to 500 , NPS ½ to 20

Nominal pressure PN 16 to 400,  Class 150 to 2500

Temperatures -196 to +550 °C. -325 to +1022 °F

Type 3251 Globe Valve operated with

. Type 3271 Pneumatic Actuator (Type 3251-1 Control Valve)

. Type 3277 Pneumatic Actuator (Type 3251-7 Control Valve) for integral positioner attachment

Standard version with PTFE packing for temperatures from –10 to +220 °C or with adjustable high-temperature packing for –10 to +350 °C, nominal size DN 15 to 500, nominal pressure PN 16 to 400 

– Type 3251-1, Type 3251 Valve and Type 3271 Actuator with 350 to 2800 cm² actuator area 

– Type 3251-7, Type 3251 Valve and Type 3277 Actuator with 350 to 750 cm² actuator area, for integral positioner attachment 

Series 250 Type 3252-1 and Type 3252-7 Pneumatic Control Valves 

Type 3252 High-pressure Valve

Application 

Control valve especially designed for controlling low flow rates in process engineering 

Valve sizes: G ½ to G 1 · ½ NPT to 1 NPT DN 15 to 25 · NPS ½ to 1 

Pressure rating: PN 40 to 400 · Class 300 to 2500 

Temperatures: –196 to +450 °C · –325 to +842 °F

Type 3252 High-pressure Valve with globe-style or angle-style valve body with: 

• Type 3271 Pneumatic Actuator (Type 3252-1 Control Valve) 

• Type 3277 Pneumatic Actuator (Type 3252-7 Control Valve)

Standard version designed as globe-style or angle-style valve body with V-ring PTFE packing suitable for temperatures from -10 to 220 °C (15 to 430 °F). Pressure rating PN 40 to 400 or Class 300 to 2500. Female thread G ½, G ¾, G 1 or ½ NPT, ¾ NPT, 1 NPT. Body material 1.4404/A316 L 

- Type 3252-1, Valve with Type 3271-5 Pneumatic Actuator (120 cm²) or Type 3271 Pneumatic Actuator (350 cm²) 

- Type 3252-7, Valve with Type 3277-5 Pneumatic Actuator (120 cm²) or Type 3277 Pneumatic Actuator (350 cm²) for integral positioner attachment

Series 250 Type 3253-1 and Type 3253-7 Pneumatic Control Valves 

Type 3253 Three-way Valve DIN and ANSI versions

Application 

Mixing or diverting valve for process engineering applications with high industrial requirements 

Nominal size DN 15 to 500 NPS ½ to 20

Nominal pressure PN 10 to 400, Class 150 to 2500

Temperatures -196 to +550 °C (-325 to +1022 °F)

Type 3253 Three-way Valve with 

• Type 3271 Pneumatic Actuator (Type 3253-1 Control Valve) 

• Type 3277 Pneumatic Actuator (Type 3253-7 Control Valve) for integral positioner attachment

Standard version with PTFE packing for temperatures from 14 to 428 °F (-10 to +220 °C) or with adjustable high-temperature packing from 14 to 662 °F (-10 to +350 °C), valve size NPS ½ to 20, pressure rating Class 150 to 900 

–Type 3253-1. Type 3253 Valve and Type 3271 Actuator with 350 to 2800 cm² actuator area.

–Type 3253-7. Type 3253 Valve and Type 3277 Pneumatic Actuator with 350 to 700 cm² actuator area, for integral positioner attachment 

Series 250 Type 3254-1 and Type 3254-7 Pneumatic Control Valves 

Type 3254 Globe Valve DIN and ANSI versions

Application 

Control valve for process engineering applications with high industrial requirements, particularly for high pressures and temperatures 

Nominal size DN 80 to 500,  NPS 3 to 20

Nominal pressure PN 16 to 400, Class 150 to 2500 

Temperatures -196 to +550 °C, -325 to +1022 °F

Type 3254 Globe Valve operated with 

• Type 3271 Pneumatic Actuator (Type 3254-1 Control Valve) 

• Type 3277 Pneumatic Actuator (Type 3254-7 Control Valve) for integral positioner attachment

Standard version with PTFE packing for temperatures from 14 to 428 °F (-10 to +220 °C) or with adjustable high-tempera‑ ture packing from 14 to 662 °F (-10 to +350 °C), valve size NPS 3 to 20, pressure rating Class 150 to 2500 

– Type 3254-1, Type 3254 Valve and Type 3271 Actuator with 350 to 2800 cm² actuator area

– Type 3254-7, Type 3254 Valve and Type 3277 Pneumatic Actuator with 350 to 750 cm² diaphragm area for integral positioner attachment

Series 250 Type 3256-1 and Type 3256-7 Pneumatic Control Valves 

Type 3256 Angle Valve DIN and ANSI versions

Application 

Control valve for process engineering applications with high industrial requirements 

Nominal size DN 15 to 500,  NPS ½ to 20

Nominal pressure PN 16 to 400, Class 150 to 2500

Temperatures -196 to +550 °C, -325 to +1022 °F

Type 3256 Angle Valve with 

• Type 3271 Pneumatic Actuator (Type 3256-1 Control Valve) 

• Type 3277 Pneumatic Actuator (Type 3256-7 Control Valve) for integral positioner attachment

Standard version with PTFE packing for temperatures from 14 to 428 °F (–10 to +220 °C) or with adjustable high-temperature packing from 14 to 662 °F (–10 to +350 °C), valve size NPS ½ to 20, pressure rating Class 150 to 2500.

– Type 3256-1. Type 3256 Valve and Type 3271 Actuator with 350 to 2800 cm² actuator area.

– Type 3256-7. Type 3256 Valve and Type 3277 Pneumatic Actuator with 350 to 750 cm² actuator area, for integral positioner attachment 

Series 250 Type 3259-1 and Type 3259-7 Pneumatic Control Valves 

Type 3259 Angle Valve

Application 

Control valve for industrial high-pressure plants according to IG standard 

Valve sizes DN 16 to 90 

Nominal pressure PN 325 

Temperature range –10 to +450 °C

Type 3259 Angle Valve with 

• Type 3271 Pneumatic Actuator (Type 3259-1 Control Valve) 

• Type 3277 Pneumatic Actuator (Type 3259-7 Control Valve) for integral positioner attachment

Standard version with spring-loaded double packing for temperatures from -10 to +220 °C; nominal sizes DN 16, 24, 30, 45, 58, 70 and 90. Nominal pressure PN 325. 

Body made of 1.4571 (RA4) with intermediate flanges made of 1.7218 (K2), end connections as screwed flanges with lens ring gaskets 

– Type 3259-1, Type 3259 Valve and Type 3271 Actuator with 350 to 2800 cm² actuator area

– Type 3259-7, Type 3259 Valve and Type 3277 Pneumatic Actuator with 350 to 700 cm² actuator area, for integral positioner attachment

Datasheets:

Type 3251-1 and Type 3251-7 Pneumatic Control Valves DIN version

Type 3251-1 and Type 3251-7 Pneumatic Control Valves ANSI version

Type 3252-1 and Type 3252-7 Pneumatic Control Valves

Type 3253-1 and Type 3253-7 Pneumatic Control Valves DIN version

Type 3253-1 and Type 3253-7 Pneumatic Control Valves ANSI version

Type 3254-1 and Type 3254-7 Pneumatic Control Valves DIN version

Type 3254-1 and Type 3254-7 Pneumatic Control Valves ANSI version

Type 3256-1 and Type 3256-7 Pneumatic Control Valves DIN version

Type 3256-1 and Type 3256-7 Pneumatic Control Valves ANSI version

Type 3259-1 and Type 3259-7 Pneumatic Control Valves