Pentair Südmo Hygienic Double Block and Bleed Butterfly Valves F250D/F251D

Pentair (Keystone) Hygienic Double Block and Bleed Butterfly Valves F250D/F251DPentair Südmo Hygienic Double Block and Bleed Butterfly Valves F250D/F251D provide safe separation of incompatible fluids in a compact design. By integrating two butterfly discs and independent vent/drain valves into a common housing, this leakage detection butterfly valve completely isolates the self-draining leakage chamber with a single valve housing and actuator.

General Application

  • CIP/process separation
  • Non-compatible fluid separation
  • Seat integrity monitoring

Typical industries

  • Dairies
  • Breweries
  • Wineries
  • Food processing
  • Pharmaceutical
  • Chemical

Benefits

  • Full range of seats materials available
  • Optional end connections
  • Full range of optional accessories
  • Linkage driven, with only one actuator required
  • Linkage safety guard fitted as standard

Features

  • PENTAIR proven valve and actuator technology
  • Failsafe pneumatic interlocks
  • Fully machined 316L or 304L stainless steel body
  • Linkage driven, with only one actuator required
  • Linkage safety guard fitted as standard
  • Overlapping discs to minimize leakage cavity volume on larger sizes
  • Travel limited actuator to stop disc contact on larger sizes
  • Full range of seats materials available
  • Optional end connections
  • Full range of optional accessories

Technical data

Sizes: DN 25 to DN 150 (Inch OD 1.0’’ to 6.0’’)

Max product pressure at 20°C: 1000kPa (10bar)

Rec. working pressure at 20°C: 600 kPa (6 bar)

Min. product pressure at 20°C: Full vacuum

Temperature range: -10°C to 95°C

End connections: BW, clamp, RJT, wafer flange, others on request

Product Information

Operating Principle

The PENTAIR F250D double block and bleed butterfly valve consists of two sets of standard F250 butterfly valve components arranged in series, within a single integral valve body, to provide an inline separation cavity when both valves are in the closed position. This inline separation of products is used to isolate non-compatible fluids (i.e. CIP/product.) The separation cavity has two pneumatically interlocked poppet valves, tangentially opposed to provide for the introduction and draining of CIP or flushing liquids. Their position provides for a turbulent circular washing action plus facilitates a drain to atmosphere should either of the separate valve seats fail. The valve’s twin discs are connected by a linkage arrangement to the pneumatic actuator that simultaneously operates the pneumatic poppet valves.

Pentair (Keystone) Hygienic Double Block and Bleed Butterfly Valves F250D/F251D

Parts List

No. Description Material Standard
1 Body spacer 316L, 304L Stainless Steel ASTM A276
2 CIP piston PTFE Commercial
3 Nut and ferrule 316L, 304L Stainless Steel ASTM A276
4 Spring 302 Stainless Steel ASTM A313
5 CIP valve body 316L, 304L Stainless Steel ASTM A276
6 CIP valve cylinder 316L, 304L Stainless Steel ASTM A276
7 O-ring NBR
8 O-ring FKM
9 Air fittings NP bronze
10 Valve body 316L, 304L Stainless Steel ASTM A276
11 Disc 316L Stainless Steel ASTM A276
12 Arm driven 304 Stainless Steel ASTM A27 ASTM A276
13 Arm driving 304 Stainless Steel ASTM A27 ASTM A276
14 Arm linkage 304 Stainless Steel ASTM A27 ASTM A276
15 Mounting bracket 304 Stainless Steel ASTM A27 ASTM A276
16 Seat VMQ (white) FDA
EPDM (black) FDA
NBR (black) FDA
FKM (red) FDA
17 Guard assembly 304 Stainless Steel ASTM A276

Pentair (Keystone) Hygienic Double Block and Bleed Butterfly Valves F250D/F251D

Note: F250D with F257 actuator and control head

F250D with F257 Actuator Dimensions (mm)

Valve size

L

DN Inch OD (B/W) (Clamp) (BSM) L1 L2 L3 H H1 H2 H3 H4 OD ID ØACT
25 1.0″ 112 142 142 200 77 124 434 104 324 293 34.5 25.8 22.3 104
40 1.5″ 112 142 142 200 77 126 444 114 334 303 39.5 38.5 35.0 104
50 2.0″ 112 142 142 200 77 131 459 129 349 318 47.0 51.2 47.7 104
65 2.5″ 112 142 162 200 77 134 468 138 358 327 52.0 63.9 60.4 104
80 3.0″ 125 145 157 232 98 143 591 178 493 462 62.0 76.6 73.1 141
100 4.0″ 135 157 169 232 98 149 618 205 520 489 75.5 102.0 98.5 141

 

F251D with F257 Actuator Dimensions (mm)

Valve size L    
DN Metric (B/W) (Clamp) L1 L2 L3 H H1 H2 H3 H4 OD ID ØACT
25 25 112 130 200 77 124 434 104 324 293 34.5 25.8 26.0 104
32 32 112 130 200 77 126 444 124 334 303 34.5 35.5 32.0 104
40 40 112 130 200 77 126 444 114 334 303 39.5 35.2 32.0 104
50 50 112 130 200 77 131 459 129 349 318 47.0 54.5 50.0 104
65 65 115 139 200 77 134 468 138 358 327 52.0 70.4 66.0 104
80 80 119 147 232 98 143 591 178 493 462 62.0 85.4 81.0 141
100 100 119 147 232 98 149 618 205 520 489 75.5 104.4 100.0 141

 

Pentair (Keystone) Hygienic Double Block and Bleed Butterfly Valves F250D/F251D

Note: F250D with MRP/Premiair actuator. F79U/E option also available.

F250D with MRP/F79U Actuator Dimensions (mm)

Valve size

L

 
DN Inch OD (BW) (Clamp) (BSM) L1 L2 L3 L4 L5 H H1 H2 H3 H4 OD ID
125* 5.0″ 179 205 242 325 140 144 155 469 99 155 35 282 132.4 125
125** 5.0″ 179 205 242 325 140 144 155 469 99 155 35 282 132.4 125
150* 6.0″ 185 215 236 242 325 140 144 155 493 115 167 37 282 153 148.4
150** 6.0″ 185 215 236 242 325 140 144 155 493 115 167 37 282 153 148.4

F251D with MRP/F79U Actuator Dimensions (mm)

Valve size L  
DN Metric (BW) (Clamp) (BSM) L1 L2 L3 L4 L5 H H1 H2 H3 H4 OD ID
125* 125 179 205 173 242 325 140 144 155 469 99 155 35 282 129.4 125
125** 125 179 205 173 242 325 140 144 155 469 99 155 35 282 129.4 125
150* 150 185 215 181 242 325 140 144 155 493 115 167 37 282 154.4 150
150** 150 185 215 181 242 325 140 144 155 493 115 167 37 282 154.4 150

Notes: * Dims with MRP/Premiair actuators ** Dims with F79U/E actuators

Selection Guide

Pentair (Keystone) Hygienic Double Block and Bleed Butterfly Valves F250D/F251D Selection Guide