GENERAL APPLICATION

• Waste water• Mining• Power• Chemical• Petrochemical• General process

TECHNICAL DATA

Size range: DN 50 - 900 (NPS 2 - 36)Temperature rating: 150°C (300°F) EPDM (std) 95°C (200°F) NBR 205°C (400°F) FKMPressure rating: DN 50 - 600 = 1000 kPa (NPS 2 - 24 = 150 psi) DN 750 - 900 = 600 kPa (NPS 30 - 36 = 100 psi) at ambient temperatureEnd connections: MSS SP-81 Face to face

KEYSTONE KNIFE GATE VALVESFIGURE PCS17

FEATURES

• Unique drop-in next-generation perimeter cartridge seats ensure zero leakage and quick and cost-effective maintenance resulting in lower cost of ownership.

• Re-engineered seat geometry and a new precision moulding process ensure zero water leakage at low or high pressures.

• Seat material is available a variety of materials including EPDM, Viton (FKM), Nitrile (NBR).

• The seat is in-line replaceable.• Solid cast, one piece body in 316 stainless

steel or WCB cast carbon steel. Designed and qualified through FEA analysis for optimum performance and reliability.

• Four post yoke design makes it easier to make packing adjustments and is more efficient for seat repair/replacement. Also makes actuator retro-fitting quick and easy.

• Built to industry standards including; MSS SP-81 face to face and full port design to Schedule 40.

Bi-directional zero leakage knife gate valve. The new standard for innovation and performance with its drop-in new generation perimeter seat, that ensures zero leakage in either direction

VCTDS-02517-EN 16/04www.pentair.com/valves © 2012 Pentair plc. All Rights Reserved.

2

OPTIONS

• Handwheel (standard)• Bevel gear operators• Non-rising stem actuator• Cable lockout for manual handwheel valves• Lock-pin style lockouts for open/closed

positions• Pneumatic/hydraulic/spring cylinders• Electric actuators• Control accessories• Extension stems, floorstands, stem guides• Safety guards and shrouds

KEYSTONE KNIFE GATE VALVESFIGURE PCS17

VALVE BENEFITS

Stroke stop-stud assembly allows gate/seat adjustment to prolong seat life

Self-locking hand wheel retaining nut

Cast ductile iron handwheel

Encapsulated acid-resistant bronze stem nut with superior support for smooth operation. Stem nut is replaceable from the top, without removing the yoke

Heavy cross-section 316 stainless steel stem, single-lead. ACME threads for ease of operation

Multiple rows of K-LON packing. Other packing materials are available

Cast gland follower

One-piece, solid cast 316 or WCB body designed and qualified through FEA analysis to meet the pressure rating and shell test requirements of MSS SP-81

Resilient perimeter cartridge seat forms a drip-tight seal around the gate ensuring zero leakage in either direction,even at zero line pressure

The cartridge seat also features an integral metal substrate to retain the seat and support the packing material

Available in EPDM, Nitrile (NBR) or Viton (FKM)

Flanges drilled and tapped to ASME B16.5/150, AS 2129 Table D or E

Machined raised gasket faces

3

611

2

6

2

12

9

7

5

13

8

1

4

10

11

3

D

G

CC1

ØF

AB

E

C2

611

2

6

2

12

9

7

5

13

8

1

4

10

11

3

D

G

CC1

ØF

AB

E

C2

611

2

6

2

12

9

7

5

13

8

1

4

10

11

3

D

G

CC1

ØF

AB

E

C2

50 (2) 50 (2) 105 (4⅛) 362 (14¼) 419 (16½) 439 (17¼) 48 (1⅞) 152 (6) 203 (8) 70 (2¾) 9.5 (21) 65 (56)80 (3) 80 (3) 138 (5½) 406 (16) 486 (19⅛) 527 (20¾) 51 (2) 191 (7½) 203 (8) 73 (2⅞) 11.5 (25) 154 (133)100 (4) 100 (4) 157 (6⅙) 454 (17⅞) 559 (22) 602 (23⅔) 51 (2) 229 (9) 203 (8) 73 (2⅞) 14.5 (32) 291 (251)150 (6) 150 (6) 216 (8½) 597 (23½) 756 (29¾) 782 (30⅘) 57 (2¼) 279 (11) 305 (12) 89 (3½) 27.5 (61) 722 (622)200 (8) 200 (8) 270 (10⅝) 699 (27½) 895 (35¼) 978 (38½) 70 (2¾) 342 (13½) 305 (12) 89 (3½) 38.0 (84) 1236 (1065)250 (10) 250 (10) 328 (13) 810 (31⅞) 1067 (42) 1144 (45) 70 (2¾) 406 (16) 406 (16) 127 (5) 63.0 (139) 2037 (1756)300 (12) 300 (12) 381 (15) 927 (36½) 1232 (48½) 1361 (53⅗) 76 (3) 483 (19) 406 (16) 127 (5) 86.0 (190) 3080 (2655)350 (14) 350 (14) 438 (17¼) 1026 (40⅜) 1359 (53½) 1549 (61) 76 (3) 533 (21) 508 (20) 127 (5) 130.0 (287) 3515 (3030)400 (16) 400 (16) 490 (19¼) 1130 (44½) 1511 (59½) 1699 (66⅞) 89 (3½) 597 (23½) 508 (20) 178 (7) 172.0 (379) 4450 (3836)450 (18) 450 (18) 552 (21¾) 1232 (48½) 1664 (65½) 1850 (72⅞) 89 (3½) 635 (25) 508 (20) 267 (10½) 205.0 (452) 5573 (4804)500 (20) 500 (20) 610 (24) 1346 (53) 1826 (71⅞) 2019 (79½) 114 (4½) 711 (28) 508 (20) 289 (11⅜) 285.0 (628) 6938 (5981)600 (24) 600 (24) 725 (28½) 1581 (62¼) 2160 (85) 2353 (92⅔) 114 (4½) 838 (33) 508 (20) 397 (15⅝) 430.0 (948) 10192 (8786)750 (30) 731 (28¾) 858 (33⅘) 2082 (82) 2661 (104¾) - 118 (4⅝) 985 (38½) 457 (18) 356 (14) 775.0 (1708) 17535 (15115)900 (36) 877 (34½) 1023 (40⅓) 2388 (94) 3115 (122⅝) - 118 (4⅝) 1169 (46) 457 (18) 458 (18) 1141.0 (2515) 25230 (21748)

PARTS LISTNo. Description Material No. Description Material1 Body Carbon steel, 316 S/S 8 Yoke post 316 S/S2 Gate 304 S/S, 316 S/S 9 Bushing retainer 304 S/S3 Gland follower Carbon steel, 316 S/S 10 Stem nut Bronze4 Seat EPDM , Nitrile, FKM 11 Stroke adjustment nut 304 S/S5 Spindle 304 S/S, 316 S/S 12 Handwheel Iron6 Gland packing K-LON 13 Clevis 304 S/S, 316 S/S7 Yoke top plate Carbon steel, 316 S/S 14 Fasteners 304 S/S

NOTEDimension D = The face to face dimension.Dimension E = The maximum valve or upstand clearance dimension for installation.* Kv = The flow rate of water in m³/hr that will pass through a valve with a differential pressure of 1 bar (100 kPa) at 20°C.❖ Cv = The volume of water in US gpm that will pass through a valve with a differential pressure of 1 psi at 60°F.Cv = 1.155 KvDimensions are nominal.DN 750 and 900 (NPS 30 and 36) are with bevel gear operator.

KEYSTONE KNIFE GATE VALVESFIGURE PCS17

DIMENSIONS mm (inches)

Valve sizeDN (NPS)

BoreA

Rising spindleMass

kg (lbs)Kv* (Cv❖)

at full open(closed) (open)

B C C1 C2 D E ØF G

4

0 50 100

100 200 300 400 500

150 200135 250 3000

500(5)

50

100

150

200

1000(10)

1500(15)

JIS-10ASTM A 105

ASME 150AS 2129 E

1 2 3

PRESSURE/TEMPERATURE GRAPHPRESSURE/TEMPERATURE RATINGS

Nitrile seated1000 kPa/10 bar (150 psi) at 20°C (65°F)820 kPa/8.2 bar (120 psi) at 135°C (275°F)

EPDM seated1000 kPa/10 bar (150 psi) at 20°C (65°F)770 kPa/7.7 bar (110 psi) at 150°C (300°F)

FKM seated1000 kPa/10 bar (150 psi) at 20°C (65°F)720 kPa/7.2 bar (105 psi) at 200°C (390°F)

1. Nitrile seated valve trim code numbers are 521 and 531

2. EPDM seated valve trim code numbers are 520 and 530

3. FKM seated valve trim code numbers are 522 and 532

Trim code Body Gate Seat Gland follower Bridge Spindle Packing520 316 S/S 316 S/S EPDM 316 S/S 316 S/S 316 S/S K-LON530 Carbon steel 304 S/S EPDM Carbon steel Carbon steel 304 S/S K-LON521 316 S/S 316 S/S Nitrile 316 S/S 316 S/S 316 S/S K-LON531 Carbon steel 304 S/S Nitrile Carbon steel Carbon steel 304 S/S K-LON522 316 S/S 316 S/S FKM 316 S/S 316 S/S 316 S/S K-LON532 Carbon steel 304 S/S FKM Carbon steel Carbon steel 304 S/S K-LON

SELECTION GUIDEExample: 250 (10) PCS17 520 AS 2129 EValve sizeDN 50 - 900 (NPS 2 - 36)Figure numberPCS17 Resilient perimeter seatTrim codeSee tableEnd connectionsAS 2129 E or ASME 150

STANDARD SEAT DETAIL

NOTETo minimize risk to personnel, Pentair recommend the use of purpose built guards and shrouds. Refer to the Pentair data sheet or consult factory for details.

Metal substrate to retain seat and support the packing material

KEYSTONE KNIFE GATE VALVESFIGURE PCS17

Pres

sure

kPa

/(bar

)

Pres

sure

psi

Temperature °C

Temperature °F

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