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32 Parallel Slide Gate Valve Accessories Operators…. Dewrance Parallel Slide Gate Valves can be equipped with gear operators – when handwheel rim torque exceeds 50 lbs. push and 50 lbs. pull. Bevel gear; bevel and spur gear; and spur gear operators are available. Power operators – All Dewrance Parallel Slide Gate Valves may be adapted for motor operators, pneumatic or hydraulic cylinders. The low torque requirements and the position seating of the Dewrance Valve provides economic power operator sizing. When ordering, the following information should be supplied: ● Operating pressure/temperature ● Differential pressure ● System fluid ● Operation time ● Control voltage ● System power supply ● Required enclosure type ● Additional electrical features Parallel Slide Valves for Regulating Duty If a valve is required for flow regulation duties Dewrance can supply a parallel slide valve fitted with a “vee-ported” seat, and special pattern discs. The upstream seat is drilled to provide a pressure equalizing feature and the valve becomes unidirectional. By-Pass Valves…. Dewrance Parallel Slide Gate Valves can be fitted with By- Pass Valves when specified by the customer. Dewrance By- Pass Valves have a parallel slide gate design with a pressure seal bonnet, a forged body, butt-weld ends, can be motor operated and are in accordance with MSS-SP-45. By-pass, equalizing by-pass, equalizing pipe and drain arrangements are available to suit customer design installation. Application requests should include the following additional information: ● Unidirectional or bidirectional flow ● Main valve installation position ● Piping variations or restriction unique to your design. Valve disc View through outlet of Vee-port Seated Valve Valve seat
High pressure Forged Steel Parallel Slide Gate Valves Sizes 3/4” – 4” ASME B16.34 – 1996 Pressure Class: 1690, 2850, 4500 33
Page 1 and 2: HIGH PERFORMANCE LINE VALVES FOR PO
Page 3 and 4: DEWRANCE CONTROLLING PRESSURE WORLD
Page 5 and 6: State of the art machine tools play
Page 7 and 8: QUALITY STANDARD AND NDE Dewrance h
Page 9 and 10: 10 A TOTAL VALVE CAPABILITY - FROM
Page 11 and 12: 12 High Pressure Cast Steel Paralle
Page 13 and 14: Advantages of Venturi Parallel Slid
Page 15 and 16: Pressure/Temperature Ratings (Paral
Page 17 and 18: Pressure/Temperature Ratings (Paral
Page 19 and 20: Cast Steel Parallel Slide Gate Valv
Page 29: Cast Steel Parallel Slide Gate Valv
Page 33 and 34: 36 Forged Steel Parallel Slide Gate
Page 39 and 40: 42 Low Pressure Cast Steel Parallel
Page 47 and 48: High pressure Steel Check Valves Si
Page 49 and 50: 54 Pressure/Temperature Ratings (Ch
Page 51 and 52: 56 Forged Steel Swing Disc Check Va
Page 53 and 54: 58 Cast Steel Tilting Disc Check Va
Page 55 and 56: 60 Tilting Disc Check Valve Unique
Page 57 and 58: 62 Low Pressure Steel Swing Check V
Page 59 and 60: Cast Steel Swing Check Valve Sizes
Page 61 and 62: Cast Steel Swing Check Valve Sizes
Page 63 and 64: Bled Steam Check Valve Sizes 6” -
Page 65 and 66: Product Application Tests Flow Test
Page 67 and 68: 74 Pressure/Temperature Ratings Imp
Page 69 and 70: 76 Bled Steam Check Valve Sizes 6
Page 71 and 72: 78 Bled Steam Check Valve Unique Se
Page 73 and 74: 80 Bled Steam Check Valve - Options
Page 75 and 76: 82 Feed Water Heater Isolation Syst
Page 77 and 78: Feed Water Heater Isolation System
Page 79 and 80: Feed Water Heater Isolation Valve S
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Feed Water Heater Isolation Valve S
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Reheater Isolating Device Sizes 16
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Reheater Isolating Device Sizes 16
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96 Pressure/Temperature Ratings Col
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98 Reheater Isolating Device Featur
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100 Materials of Construction ASTM
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DEWRANCE HEADQUARTERS IN THE UK UNI
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Design, Butt Weld Ends

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