When the standard Q-Check E-Disk range is unable to fulfill the specification needs, in terms of required design features, QCSS is able to delivery a custom designed butterfly valve. The custom designed products extend the size capability to valves as large as 120″ diameter and the pressure rating up through ANSI 2500#. Valves in wafer, lugged, flanged, double flanged and butt weld are all available. Special features including anti-cavitation / low noise trims, refractory lined. step-seat for improved shut-off capability, ceramic lined, etc. are part of the extensive design options.

A wide variety of actuator designs and styles are available to complement the specific needs of the custom rang

e of butterfly valves, including pneumatic and hydraulic cylinders, electric and manual.

SIZE / PRESSURE RANGE

• 2″ thru’ 48″ for ANSI 150#.
• 2″ thru’ 12″ for ANSI 300# – 600#.

END CONNECTIONS

• Wafer.

BONNET DESIGNS

• Standard integral.

PACKING DESIGNS

• Teflon and Teflong Glass-filled.
• Graphite and Grafoil.

TRIM CHARACTERISTICS

• Modified equal percent.

TRIM DESIGNS

• Eccentric commed disk.
• Double offset disk.
• Metal to metal and soft seat.
• Pressure assisted seating arrangment.

LEAKAGE CLASSIFICATION

• Standard ANSI / FCI 70-2, Class IV.
• Bubble-tight ANSI / FCI 70-2 Class VI.

MATERIALS OF CONSTRUCTION

• Bodies
  • Carbon, steel, stainless steel, chrome-molybdenum, Monel, Hastelloy B & C, Alloy 20, Titanium and many other cast or forged materials.
• Trims
  • 316, 304, 347, 416, 17-4 and 440C stainless steel, Monel, Hastelloy B & C. 
  • Hard facings including Stellite, Colmonoy and DHS on trim components.

ACTUATORS

• Double acting spring cylinder.
• Manual handwheels.
• Electric and hydraulic.

POSITIONERS

• Pneumatic single and double acting.
• Standard I/P single and double acting.
• Smart single and double acting.