Africa (Pty)Ltd

127 Lemmer Road, Vulcania Ext. 2, Brakpan, RSA PO Box 10270 Dalview 1544. Phone No. : +27 11 736 4994 Fax: +27 11 736 6130 Email: pleixquip@pleixquip.co.za Website: www.pleixquip.co.za

Page 1 of 7

STAINLESS STEEL

DUO CHECK VALVE PQ-SS-DC-150

API – Standard Dual Plate Wafer Style Check valve – Carbon & Stainless Steel Materials Installation Dimensions

Design : API-594 Face To Face : API-594 Inspection : API-598/ISO-5208 Suit Flange For: JIS-B 2211-2216 : ANSI-B16.10 (40mm – 600mm) API-605 & MSS-SP-44 (650mm and larger) ISO-7005/1

40mm to 300mm 350mm and larger

Africa (Pty)Ltd

127 Lemmer Road, Vulcania Ext. 2, Brakpan, RSA PO Box 10270 Dalview 1544. Phone No. : +27 11 736 4994 Fax: +27 11 736 6130 Email: pleixquip@pleixquip.co.za Website: www.pleixquip.co.za

Page 2 of 7

Product Characteristics

Water Hammer of Prevention: Because it is aided by a spring, a Wafer Check Valve is almost closed before the flow reverses reducing water hammer. If a special high torsion spring is used and the valve is mounted horizontally, the Wafer Check Valve will operate silently.

Low cost Installation: Traditional flanged Swing Check Valves are heavy and therefore require special foundations or supports which are expensive. Wafer Check Valves on the other hand are relatively light and can be installed directly on the pipe without any support whatsoever. Most of traditional Swing Check Valves do not close properly with the disc hanging slightly open. The plates in the Wafer Check Valve are light and are held in the closed position by a spring. The Wafer Check Valve may be mounted in any position from horizontal to vertical.

Lower Pressure Drop:

The open area through Dual Plate Wafer Style Check Valves is about the same as through Swing Check Valves. The Plates in most of Swing Check Valves don’t open fully, so the clear area is in the shape of a crescent. The bridge across Dual-Plates Wafer Style Check Valves reduces the clear area by about the same amount. The big difference between the two styles is in the amount of energy required to open them and keep them open.

No Slamming: Because of the spring, Wafer Check Valve plates start closing against the flow before it stops. The flow, therefore, cushions the plates and slows them down, which prevents slamming and reduces water hammer.

Seat Leakage: Our products, the Dual Plate Wafer Style Check Valve, is tested to API-598 which has a metal to metal seat permitted seat leakage of 3 cc/inch of bore/mm (water test) or 700cc/inch (gas test).

Africa (Pty)Ltd

127 Lemmer Road, Vulcania Ext. 2, Brakpan, RSA PO Box 10270 Dalview 1544. Phone No. : +27 11 736 4994 Fax: +27 11 736 6130 Email: pleixquip@pleixquip.co.za Website: www.pleixquip.co.za

Page 3 of 7

Pressure Spring 180° T.q.

(kg/cm) Number (kg/mm)

50 61.6*10¯³ 0.875 1 3.4

65 52.42*10¯³ 0.744 1 5.5

80 60.00*10¯³ 0.852 1 11.3

100 31.40*10¯³ 0.446 1 17.8

125 25.65*10¯³ 0.364 2 34.4

150 15.95*10¯³ 0.226 2 38.1

200 24.21*10¯³ 0.344 2 147.6

250 16.23*10¯³ 0.23 2 205

300 21.62*10¯³ 0.307 2 574

350 13.95*10¯³ 0.198 2 451.4

400 13.95*10¯³ 0.198 2 589.4

450 6.76*10¯³ 0.096 2 668.3

500 8.29*10¯³ 0.118 2 756.7

550 7.39*10¯³ 0.105 4 934.2

600 6.51*10¯³ 0.092 4 921.6

650 7.93*10¯³ 0.113 4 1354.1

700 6.55*10¯³ 0.093 4 1333.1

750 5.6*10¯³ 0.08 4 1385.3

800 7.81*10¯³ 0.111 4 1967.6

900 6.07*10¯³ 0.086 4 2450

1000 6.93*10¯³ 0.098 4 3337.5

1050 7.35*10¯³ 0.104 4 4100

1100 7.80*10¯³ 0.111 4 4648

1200 5.98*10¯³ 0.085 4 2665

Marking Standard

Flange Suit StandardANSI-B16.42 (D.I)

Break Pressure and Spring Torque

Size

mm

Break Pressure Spring Torque

PSI

ISO-7005/1 (C.S & S.S)

Thickness Standard

Face to Face Standard

API-605 (26" & Larger Sizes)

MSS SP-44 (26" & Larger Sizes)

ANSI-B 16.1 (C.I)

ANSI-16.5 (C.S & S.S)

BS10 TABLE(C.I & D.I)

ISO 7005/2 (C.I & D.I)

API-594

ISO-5752 Long Pattern

MANUFACTURER'S

MSS-SP-25

API-6D

MANUFACTURER'S

ANSI-B 16.5

Inspection Standard

MANUFACTURER'S

ISO-5208

API-598

API-594

API-600

ANSI-B 16.42

MSS-SP-71

JIS-B 2201

Temperature -

Pressure

Standard

Flange Face

Standard

MSS-SP-6

Basic Design and Inspection Standard

Basic Design Standard API-594

ANSI-B 16.1ANSI-B 16.34

Africa (Pty)Ltd

127 Lemmer Road, Vulcania Ext. 2, Brakpan, RSA PO Box 10270 Dalview 1544. Phone No. : +27 11 736 4994 Fax: +27 11 736 6130 Email: pleixquip@pleixquip.co.za Website: www.pleixquip.co.za

Page 4 of 7

NO PART NAME QTY REMARK NO PART NAME QTY REMARK

1 BODY 1 6 STOP PIN 1

2 SEAT 1 7A 4 API-STANDARD

3 PLATE 2 7B 4 ISO STANDARD

1 40 TO 125 mm 8 BODY BEARING 2

4 SPRING 2 150 TO 550 mm 9 PLATE BEARING 2

4 600. and Larger Size 1 150 TO 550 mm

5 HINGE PIN 1 2 600 and Larger Size

PLUG

10 EYE-BOLT

VALVE CONSTRUCTION

Africa (Pty)Ltd

127 Lemmer Road, Vulcania Ext. 2, Brakpan, RSA PO Box 10270 Dalview 1544. Phone No. : +27 11 736 4994 Fax: +27 11 736 6130 Email: pleixquip@pleixquip.co.za Website: www.pleixquip.co.za

Page 5 of 7

B 16.34

A216 A217 A352 A352 A351 A351 A351 A216 A217 A352 A352 A351 A351 A351

WCB WC6 LCB LCC CF8 CF8M CF8M WCB WC6 LCB LCC CF8 CF8M CF8M

-20 ~ -29 ~

100 38 285 290 265 290 275 275 275 740 750 695 750 720 720 720

200 93 260 260 250 260 235 240 240 675 710 655 750 600 620 620

300 149 230 230 230 230 205 215 215 655 675 640 730 530 560 560

400 204 200 200 200 200 180 195 195 635 660 620 705 470 515 515

500 260 170 170 170 170 170 170 170 600 640 585 665 435 480 480

600 316 140 140 140 140 140 140 140 550 605 535 605 415 450 450

650 343 125 125 125 125 125 125 125 535 590 525 590 410 445 445

700 371 110 110 0 110 110 110 110 535 570 - 570 405 430 430

750 399 95 95 - - 95 95 95 505 530 - - 400 425 425

800 427 80 80 - - 80 80 80 410 510 - - 395 415 415

850 454 - 65 - - 65 65 65 - 485 - - 390 405 405

900 482 - 50 - - 50 50 - - 450 - - 385 395 -

950 510 - 35 - - 35 35 - - 380 - - 375 385 -

1000 538 - 20 - - 20 20 - - 225 - - 325 365 -

WORKING PRESSURE BY CLASSES Psig.TEMP

150 300

F C

ASTM ASTM

ANSI PRESSURE – TEMPERATURE RATING MAXIMUM NON-SHOCK PRESSURE TEMPERATURE RATING (STANDARD)

Cv Pressure Drop Formula

When P2 P./2 let P = P 2

(°𝐹 + 460)

Based upon ISA-S75.01-1985 Q = Flow a1 = Specific weight, For turbulent flow Liquid: U.S gall per minute upstream Conditions (lb/ftᶟ ) Gas: standard cu.ft. per hour Ff = Liquid critical pressure

Cv= Valve co-efficient ratio factor

∆P = (𝑃1−𝑃2) Pressure drop psi Ff = 0.96 − 0.28 (Pv

Pc) ½

When P2<P1 /2 let P2 = P1 /2 Pv = Absolute vapour pressure of P1 = Inlet pressure PSIA liquid at inlet temperature For turbulent flow P2 = Outlet pressure PSIA in PSIA

Gf = Specific Gravity of fluid, e.g. water = 1 @ 60° F,1 ATM Pc = Absolute thermodynamic

Gg = Specific Gravity of gas, critical pressure

e.g. gas = 1 @ 60° F, 1 ATM

T1 = Absolute inlet temperature

W = Flow lbs./hour Y = Expansion factor (limits between 1 and 0.67) X = Ratio of pressure drop Δ P

to absolute inlet pressure P1 Z = Gas compressibility factor (=1 for an ideal gas) M = Molecular weight

For turbulent flow FOR LIQUIDS(T = 460) W = Flow lbs/hour

FOR LIQUIDS

fG

P Cv Q

Q max of −⏞ 0.7 Cv √P1+FfPv

Gf

vaporizing liquid

W = 63.3 Cv √∆P𝑎1

FOR GASES AND VAPOURS

Q = 1360 * Cv * P1 * Y * √X

GgT1Z

W = 19.3 * Cv * P1 * Y * √XM

T1Z

Africa (Pty)Ltd

127 Lemmer Road, Vulcania Ext. 2, Brakpan, RSA PO Box 10270 Dalview 1544. Phone No. : +27 11 736 4994 Fax: +27 11 736 6130 Email: pleixquip@pleixquip.co.za Website: www.pleixquip.co.za

Page 6 of 7

Head Loss Curves

Dual Plate Wafer Style Check Valve – Carbon & Stainless Steel Materials Installation Dimensions

Africa (Pty)Ltd

127 Lemmer Road, Vulcania Ext. 2, Brakpan, RSA PO Box 10270 Dalview 1544. Phone No. : +27 11 736 4994 Fax: +27 11 736 6130 Email: pleixquip@pleixquip.co.za Website: www.pleixquip.co.za

Page 7 of 7

DIMENSIONS