Series 8000 Butterfly Valves

Transcription

1 PRECISION I RELIABILITY I PERFORMANCE Series 8000 Butterfly Valves Pressure Class ASME / Size 4in 36in

2 Contents Series 8000 Butterfly Valves overview 01 Design features & performance benefits 02 Engineering data 02 Valve body style option 04 Disc & seat construction 04 Metal seat & soft seat 04 High performance butterfly valve in detail 05 Flow coefficients 06 Standard dimensions 07

3 Designed to provide cost effective, reliable control valves for use in low-pressure applications, the high performance Series 8000 valves feature a stainless steel disc with either a soft, or stainless steel seal ring. The soft seal option provides excellent sealing capabilities in both directions. The pressure-assisted stainless steel alternative delivers excellent shut-off against pressure applied in the recommended flow direction for both liquid and gas applications. SERIES Series 8000 Butterfly Valves 01

4 Design features Heavy-duty solid body construction provides rigid support Robust parts for trouble free service and low maintenance costs Field-replaceable seat located in valve body, away from flow, provides bubble-tight shut off Available with low noise and anti-cavitation options Heavy-duty taper pins connect the valve shaft to the disc which avoids lost motion under high torque conditions Heavy shaft guiding Wide choice of packing systems Low friction bearings provide maximum radial support Performance benefits Full 90 of rotation can be utilised Increased resistance to cavitation Lower noise level on higher pressure drop Reduced inspection and maintenance costs Excellent flow capacity and control rangeability Reliable leakage performance. Bubble tight shut off available High interchangeability between sizes and other products Manufactured to ISO 9001 certification Engineering data The Series 8000 range of valves was developed to provide a cost effective, reliable and easily maintained control valve capable of working in low-pressure environments. End connection sizes 3in (80mm) to 36in (900mm) Body face to face dimensions API 609 / Severn Glocon standard Design standard API 609 Standard packing Teflon / Chevrons and Graphite Valve body ratings ASME 150 ASME 600 Body configurations Wafer, Lug and Double flanged Plug / Seat leakage class ANSI/FCI Class IV as standard, Class V with metal seat and Class VI with soft seat insert 02 Series 8000 Butterfly Valves

5 Engineering data (continued) Construction materials A wide range of standard materials is available for both the valve pressure parts and trim. These include carbon and stainless steel, duplex/super duplex and high nickel alloys. Stellite, and other hard facings/coatings are available. For full details of materials please contact us. Paint A wide range of paint finishes is available including enamel, alkyd gloss and a choice of epoxy types. Clean build Severn Glocon adheres to high clean build standards including oxygen clean and an ultra high purity clean room. Inspection & testing Severn Glocon undertakes the highest levels of inspection and testing which meet international and customer requirements. Actuation We offer a wide range of actuators including Series P Linear Spring Pneumatic Cylinders, Series N Numotor Pneumatic Pistons and Series W Diaphragm Spring Pneumatic Actuators. In addition electric, hydraulic, electro hydraulic actuators and manually operated versions are available. Instruments A wide range of control instruments is available from Severn Glocon including positioners, air-filter regulators, volume boosters, solenoid valves, and lock-up valves. Anti cavitation & low noise A special trim offers increased resistance to cavitation and a reduction in noise levels on higher pressure drop applications, by improving the valve s Cf and Ki values. The design extends the rangeability of conventional butterfly valve discs by ensuring stable and progressively smooth operation in the nearly closed positions of the valve. Control duties through the full 90 of operation can be utilised. Accurate and repeatable inherent flow characteristics are obtained. The standard is based upon the modified equal percentage curve, others are available for matching a wide range of control system requirements. Baffle plates Baffle plates or noise diffusers can be fitted into flanged body styles, or supplied loose. As many as four can be fitted which reduce noise further by splitting the pressure drop so that the pressure recovery factor is reduced. Baffle plates can be fitted in conjunction with anti cavitation/low noise discs, or they can be offered separately, depending on the application requirements. Series 8000 Butterfly Valves 03

6 Valve body style option The Series 8000 valve is available in three basic body styles wafer, lugged or flanged. Many parts are interchangeable, with the exception of the valve bodies. Lug type body Double flange body Disc & seat construction Double offset and eccentric disc mounting reduces maintenance costs and downtime, even under frequent operation, by minimising the interference between seat and disc to prolong seat life. The seats are held rigidly by the seat retainer which is inserted within the body per API 609 design requirements. Seat configuration Metal seated type Soft seated type Metal seat & soft seat The virgin PTFE seat has a flexi lip to provide bubble tight shut off in both directions. Other rigid seats including glass filled PTFE, EPDM and Viton allow a clean flow passage and prevent the deposit of fluid within the seat. Rigid seats allow unidirectional flow (shaft side inlet) providing tight shutoff under positive and vacuum applications. Flexible metal seats like die pressed stainless steel seats with in built flexibility gives Class IV leakage with minimal torque requirements. 04 Series 8000 Butterfly Valves

7 High performance butterfly valve in detail Keyway Shaft Gland flange Packing Packing washer Bearing Centraliser Metal seat Taper pin (hidden) Vane Centraliser Bearing Cover plate Series 8000 Butterfly Valves 05

8 Flow coefficients Cv The Cv values by definition are related to the flow of water (Specific gravity =1) in US Gallons per minute with a pressure drop of 1psi. Table 1: Cv factors for 150# Valve size Degrees open in mm Table 2: Cv factors for 300# Valve size Degrees open in mm Table 3: Cv factors for 600# Valve size Degrees open in mm Note: Apply appropriate piping correction factor 06 Series 8000 Butterfly Valves

9 Standard dimensions Lug type butterfly valve Double flange butterfly valve Series 8000 Butterfly Valves 07

10 Standard dimensions Table 4: Dimensions of Class 150 Valve Valve size DIM LUG DIM DIM DIM DIM in mm A B D E Ø F Ø S Table 5: Dimensions of Class 300 Valve Valve size DIM LUG DIM DIM DIM DIM in mm A B D E Ø F Ø S Table 6: Dimensions of Class 600 Valve Valve size DIM LUG DIM DIM DIM DIM in mm A B D E Ø F Ø S Note: 1 For other sizes and rating consult factory 2 For dimensions where unit is not indicated consider the unit as mm 3 Dimensions shown may vary depending upon options selected on actual product 4 Also available in flanged 08 Series 8000 Butterfly Valves

11 Table 7: Torque values to unseat the valve from closed position (150lb rating) Unseating [A+B ( P)] (lb in) Valve size Shaft size Soft seated Metal seated (up to 200 C) Fire safe Packing Friction in mm A B A B A B (lb in) (lb in) Table 8: Torque values to unseat the valve from closed position (300lb rating) Unseating [A+B ( P)] (lb in) Valve size Shaft size Soft seated Metal seated (up to 200 C) Fire safe Packing Friction in mm A B A B A B (lb in) (lb in) Note: DP (Pressure Drop) in psi The torque to open = unseating torque + packing torque + frictional torque Conversion: 1lb in = Nm 1Nm=8.85lb in Series 8000 Butterfly Valves 09

12 Severn Glocon Group plc Gloucester England UK 04 Severn Unival Widnes England UK 10 Severn Glocon Rio Brazil 16 Severn Glocon India Chennai India Mars Valve UK Gloucester England UK 05 Severn Ball Valves Aberdeen Scotland UK 11 Severn Valve Solutions Basra Iraq 17 Severn Glocon Kuala Lumpur Malaysia L.B.Bentley Stroud England UK 06 Severn Norway Bergen Norway 12 Severn Glocon Saudi Arabia 18 Severn Glocon Australia Perth Australia Ionex SG Nailsworth England UK 07 Severn Glocon Atlantic Canada Newfoundland Canada 13 Severn Glocon Doha Qatar 19 Severn Glocon Beijing China 02 Severn Unival Brighouse England UK 08 Severn Glocon Calgary Canada 14 QTRCO SG Dubai 20 Severn Glocon Seoul Korea 03 Severn Subsea Technologies Redruth England UK 09 Severn Glocon Houston Texas USA 15 Severn Glocon FZE Dubai 21 Severn Glocon Tokyo Japan PRECISION I RELIABILITY I PERFORMANCE Olympus Park Quedgeley Gloucester Gloucestershire GL2 4NF England T. +44 (0) F. +44 (0) sales@severnglocon.co.uk The Severn Glocon Group policy is one of continuous improvement and we reserve the right to modify these specification details without notice. Brochure design by verycreativepeople.co.uk