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WAFER : BUTTERFLY VALVES
MESCO WAFER BUTTERFLY VALVES WITH REPLACEABLE ELEASTOMER LINER

MESCO after nearly 20 years of proven record in Valves o various types now bring you 'Wafer Butterfly Valves with field replaceable moulded Elastomer Liner' for application in general Service and Process Industries, 100% bubble tight, suitable for installation between pipe flanges to various specifications without flange gaskets, with centred disc, which are ideally suited for isolating as well as throttling service.

ADVANTAGES
  1. COMPACT :
    Wafer Butterfly Valves take up approximately 1/6 the space of a Gate valve in the Pipe Line. Head room is also considerably less than required for conventional Valves.
  2. LOW WEIGHT :
    Wafer Butterfly Valves is of extremely compact design and weighs just 1/5 to 1/10 of conventional valves and hence do not need any special piping supports or hangers which results in saving in installation cost.
  3. BUBBLE TIGHT SHUT OFF :
    Conventional metal to metal seated valves cannot provide reliable leak tightness after repeated applications. MESCO Wafer Butterfly Valves being resilient sealted ensure complete tightness after prolonged use.
  4. EASE OF OPERATION :
    Butterfly Valves are turn (900) open to close. Other conventional Valves require multiple turns to open-close.
  5. BODY NEVER IN CONTACT WITH MEDIA :
    This is an important features of Wafer Butterfly Valves with Liner; irrespective of fluid media the body can always be offered in less expensive materials like Cast Iron and hence substantial saving assured.
  6. VERSATILITY :
    Wafer Butterfly Valves are offered for on-off and throttling/balancing services.
  7. BI-DIRECTIONAL :
    MESCO Wafer Butterfly Valves can be installed in both directions, vertical and horizontal.
  8. MAINTENANCE FREE :
    Because of high flow co-efficients of Wafer Butterfly Valves and resilient seat being self cleaning these are less susceptible.
  9. COST :
    A Wafer Butterfly Valves with Liner generally cost much less 40 to 50% than Cast Iron Gate Valves. Additional installation cost is considerably less.
  10. LIFE :
    Wafer Butterfly Valves can operate 10,000 cycles and yet remain bubble tight.
  11. PRESSURE DROP :
    Wafer Butterfly Valves have flow characteristics at least 3 times better than Globe Valves and Approximately 75% of equivalent Gate Valves.
  12. NO GASKET REQUIRED :
    The replacement Liner has built in flange face gaskets and no additional gaskets required for installation.
  13. QUICK FITTING & DISMANTLING :
    Only single set of through running bolts/studs are required thus saving time.
APPLICATIONS :

MESCO Wafer Butterfly Valves with Elastomer Liner can be used in variety of application areas such as :
  1. Water and Sewage Applications
  2. Treatment Plants
  3. Power Plants
  4. Process Plants
  5. Refrigeration and Air Conditioning
  6. Coal Ash and Cement Handling
  7. Paper & Pulp Application
  8. Food Processing
  9. Marine and Sea Water Application
  10. Oil and Fuel Application
  11. Fire Protection Application
MANUFACTURING SPECIFICATIONS :

STANDARD : A) BS : 5155
B) IS : 13095 (Short Body).
SIZE RANGE : 40 mm to 350 mm
END CONNECTIONS : Wafer Butterfly Valves are made to meet ANSI, BS, DIN and
IS Flange drilling specifications. Customers are requested to
Confirm their correct Pipe Flange during Placement of order.
METHODS OF OPERATION : In the range of 40 mm (1. 1/2 ") to 200 mm (8") Valves, the
Standard lever (Aluminium) is fitted with clutch lever to lock it in any desired position in the S.S. Positioning Plate. Valves of size 250 mm (10") and 300 mm (12") are fitted only with enclosed gear unit.
RATINGS : PN 6, PN 10 and PN 16.
DESIGN : Centred Disc, two piece shafts with Elastomer Liner that
Isolates body and internals from media with secondary sealing
arrangement for the Shaft.

We also manufacture Eccentric Disc. Flanged End, Butterfly
Valves (Sizes 300 NB to 600 NB). Smaller sizes can also be
supplied on request with Eccentric Disc, Flanged End, Butter
Valves.

Edge/Periphery of CastIron Disc Hard Chrome Plated ensures
Increase in life of Body Sleeve (Replaceable Elastomer Liner)
which can be used or suitable against the specific fluid.
TEST PRESSURE : Valves are tested for rated differential pressure for seat and
1.5 times the seat pressure for shell testing. Air Seat test
arranged on request.