WC & C Engineering Pvt. Ltd. Chikkabanavar, Bangalore, Karnataka

Zero Velocity Valve are to prevent reversal / return of water column by perfect non-slam closing just before reversal of water column giving most effective surge control on tripping of pumps in raw water/clear water cross country rising main and lift irrigation schemes.   FEATURES OF THE VALVE ► Offered in Flanged end / Butt weld construction for piping connection. ► Dome profile designed for steady flow. ► Controlled closing characteristics. ► Stainless Steel Springs for high sensitivity and low head loss. ► Bypass circuit to break the Vacuum arising upstream due to closure of valve. LIST OF IMPORTANT ORDERS FOR ZERO VELOCITY VALVES & AIR CUSHION VALVES

Vacuum Breaker cum Air Cushion Valve should be designed to allow large quantities of air intake in the pipeline during column separation occurring after pump tripping or emptying of gravity lines, based on surge analysis data. The valve is mounted on a Tee joint at location, where water column separation is likely to occur. The valve has spring loaded inlet & outlet ports of air. This valve is a tailor made valve & the sizes of the inlet & outlet ports are determined from the extent & severity of the water column separation at the given location. FEATURES OF THE VALVE ► This valve is useful and efficient for both air intake & expelling from pipeline during filling and emptying. ► This valve allow air intake in large quantities within very short time. ► These valves expel air at controlled pressure absorbing energy of returning water column to reduce severity of water column rejoinder. ► Tamper proof valve with SS / Galvanized internals. ► Inlet and Outlet air flow / pressure is adjustable. ► O-ring sealing for both inlet and outlet which is more reliable than conventional float sealing. LIST OF IMPORTANT ORDERS FOR ZERO VELOCITY VALVES & AIR CUSHION VALVES    

These specialized Butterfly valves are installed to protect hydro-electric power stations in turbine run away condition. Valves are designed to close against turbine runaway during an emergency condition. These valves act as isolating devices for inspection of penstock without dewatering the entire head race tunnel. These valves close during over velocity condition occurring due to turbine trip or runaway condition. Further, these special design Butterfly Valves can also be used for turbine inlet application instead of Spherical Valves.   FEATURES OF TURBINE INLET VALVE / PENSTOCK PROTECTION VALVES:   ► Bypass valve required will be provided. ► Companion flanges, Dismantling joints, Flange adapter as required will be provided as optional. ► Air release valve, Proximity switches will be provided as optional. ► OPU (Oil Pumping Unit) can be supplied on request when valves are not operated by Turbine governor oil pressure.

These specialized Butterfly valves are installed to protect hydro-electric power stations in turbine run away condition. Valves are designed to close against turbine runaway during an emergency condition. These valves act as isolating devices for inspection of penstock without dewatering the entire head race tunnel. These valves close during over velocity condition occurring due to turbine trip or runaway condition. Further, these special design Butterfly Valves can also be used for turbine inlet application instead of Spherical Valves.

These valves are designed with total compliance with applicable design and testing standards. All designs are validated for stress analysis. Air release valves find wide application in water works /water /effluent /sewage treatment plants. FEATURES ► Rigid and sturdy design. ► Long service life and leak-tightness even after thousands of open / close cycles. ► Resilient seated ► Single chamber, Triple function air valve ►High discharge capacity up to sonic velocity ►Large orifice to vent high quantity of air draining and filling of pipes APPLICATION ► Water works. ► Water / Effluent / Sewage treatment plants. ► Fire Fighting. ► Power.    

ROTARY ACTUATOR OPERATED WAFER TYPE BUTTERFLY VALVES WITH MANUAL OVER RIDE Wafer Butterfly valves have been developed with extensive application, design and manufacturing expertise. These products are produced by employing modern manufacturing practices under a robust quality assurance system. These practices ensure consistent product quality and dependable performance. Rotary actuators can mount right at the equipment joint without taking up the long stroke lengths required of cylinders. In Rotary actuator operated wafer type butterfly valves also has manual over ride option.

These valves are available in non rising as well as rising spindle type suitable for clear water up to 60°C. These valves are designed with total compliance with applicable design and testing standards. All designs are validated for stress analysis. Sluice valves find wide application in water works /water /effluent /sewage treatment plants. FEATURES ► Rigid and sturdy design. ► Low pressure loss across the valve. ► Long service life and leak-tightness even after thousands of open / close cycles. ► For Valves above 200mm size, Lifting hooks will be provided. ► On request, we can supply Gate valve in accordance with IS 14846 standard(Face to Face length). APPLICATION ► Water works. ► Water / Effluent / Sewage treatment plants. ► Fire Fighting. ► Power.    

Pump discharge valve facilitate the required operating time at the pump house to arrest at the surge/reversal of flow to pump. Replace two valves (Isolating valve + Non return valve) function in one valve. Body material – Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel, Cast steel Disc material – Ductile Iron, Carbon steel. Clamping ring material – Stainless Steels, Carbon steel. Seal material – EPDM, Nitrile. FEATURES OF PUMP DISCHARGE VALVES: Resilient seated Butterfly vales, bi-directional: ► “Blow-out proof” design to ensure no accidental stem push-out takes place under pressure. ► Available with a variety of hydraulic actuation. ► Adjustable closing time according to surge study can be achieved. ► After installation, final tuning / site adjustment of operating time can also be achieved. ► Standby pump optional available. ► Hand pump during power failure is inbuilt. ► Power pack manufacturer – only from reputed, proven make. ► Hydraulic units in enclosed container only, synchronized with Control panel. ► Each Hydraulic operated Butterfly valve tested individually. ► Double eccentricity is calculated and provided for each application and not a thumb rule of fixed eccentricity.

PNEUMATICALLY OPERATED WAFER TYPE BUTTERFLY VALVES WITH ACCUMULATOR Pneumatically operated valves are designed for more specialized applications, such as – Media with high dirt content, media with high viscosity, high ambient temperatures, large flow quantities, damp environments and where there is a risk of explosion. Wafer Butterfly valves have been developed with extensive application, design and manufacturing expertise. These products are produced by employing modern manufacturing practices under a robust quality assurance system. These practices ensure consistent product quality and dependable performance.

This is a top-of-line product in pipeline flow control. Our wafer and lugged Butterfly valves have been developed with extensive application, design and manufacturing expertise. These products are produced by employing modern manufacturing practices under a robust quality assurance system. These practices ensure consistent product quality and dependable performance. FEATURES â�º Top plate double drilled to fit ISO 5211 dimensions and standard secondary bolt circle dimensions. â�º Unique centre-lock seat design virtually eliminates any seat movement during the seating and un-seating of the disc. â�º Unique stem retention system to provide blow-out proof stem and easy assembly and disassembly of valve. â�º Heavy duty one piece wafer and lugged wafer body designed to withstand specified pressures. â�º Nylon coated high strength disc with hand polished disc edge and hubs ensures excellent corrosion resistance to several chemical media. â�º One piece stem with close tolerances double D drive eliminates the need for disc screws or taper pins. â�º Heavy duty bearing absorbs the forces acting on the stem/disc assembly due to line pressure. APPLICATION â�º Water works. â�º Power plants. â�º Sewage plants. â�º Process industries. â�º Chemical and petrochemical plants.    

These valves are available in non rising as well as rising spindle type suitable for clear water up to 60°C. These valves are designed with total compliance with applicable design and testing standards. All designs are validated for stress analysis. Sluice valves find wide application in water works /water /effluent /sewage treatment plants. FEATURES ► Rigid and sturdy design. ► Low pressure loss across the valve. ► Suitable for clear water up to 60°C and 5000 PPM turbidity, other fluids with maximum pressure / temperature conditions within the scope of IS:14846. ► Long service life and leak-tightness even after thousands of open / close cycles. APPLICATION ► Water works. ► Water / Effluent / Sewage treatment plants. ► Fire Fighting. ► Power.  

MANUALLY OPERATED WAFER TYPE BUTTERFLY VALVES This is a top-of-line product in pipeline flow control. Our wafer and lugged Butterfly valves have been developed with extensive application, design and manufacturing expertise. These products are produced by employing modern manufacturing practices under a robust quality assurance system. These practices ensure consistent product quality and dependable performance. FEATURES ► Top plate double drilled to fit ISO 5211 dimensions and standard secondary bolt circle dimensions. ► Unique centre-lock seat design virtually eliminates any seat movement during the seating and un-seating of the disc. ► Unique stem retention system to provide blow-out proof stem and easy assembly and disassembly of valve. ► Heavy duty one piece wafer and lugged wafer body designed to withstand specified pressures. ► Nylon coated high strength disc with hand polished disc edge and hubs ensures excellent corrosion resistance to several chemical media. ► One piece stem with close tolerances double D drive eliminates the need for disc screws or taper pins. ► Heavy duty bearing absorbs the forces acting on the stem/disc assembly due to line pressure. APPLICATION ► Water works. ► Power plants. ► Sewage plants. ► Process industries. ► Chemical and petrochemical plants.    

MANUAL OPERATED/ELECTRICALLY OPERATED BUTTERFLY VALVES Body material – Cast Iron, Ductile Iron, Carbon Steel, Stainless Steels. Disc material – Ductile Iron, Carbon Steel, Stainless Steels. Clamping Ring material – Stainless Steels, Carbon steel. Seal material – EPDM, Nitrile. Features OF Manual Operated/Electrical Operated Valve: Resilient seated Butterfly Valves : â�º Bi-directional double eccentric soft seated Butterfly valves. â�º Gearbox and Actuator direct mounting type. â�º Various types of seal design to facilitate best performance and long seal life. â�º High performance Double eccentric valves are also available in Wafer and Flanged configurations. â�º Available with a variety of Pneumatic, Electric and Hydraulic actuation. â�º We have done FEA analysis for Butterfly valves in order to analyze the behavior of Valve and ensure Design safety and Performance.    

lectrically actuated valve is reliable valve for isolation and emergency shut-down conditions. These are most popular among automated valves. Tight shut-off is guaranteed and is suitable for powder & granular fluid as well. We supply wide variety of electrically operated valves. Wafer Butterfly valves have been developed with extensive application, design and manufacturing expertise. These products are produced by employing modern manufacturing practices under a robust quality assurance system. These practices ensure consistent product quality and dependable performance.    

Air Valve is a combination of a small and a large orifice air valves, separate conventional isolating Non Rising Sluice Valve is provided for inspection / maintenance of the air valve without closing the main line. These valves are designed with total compliance with applicable design and testing standards. All designs are validated for stress analysis. Air release valves find wide application in water works /water /effluent /sewage treatment plants. FEATURES ► Double float design. ►Small orifice ball is of rubber lined seasoned timber, Large orifice ball is of Vulcanite lined seasoned timber. ►Stainless steel ball can be provided on demand. ►Perfect guide for small orifice ball and guide ribs with minimum clearance for large orifice ball for movement without wobble during   operation. ► Non clogging and self sealing balls for trouble free operation. ►Specially designed cowl to prevent unauthorized access to the large orifice ball, Provision of Tamper Proofing. ►Suitably shaped and precisely finished small orifice to enhance small orifice ball life. ►Large orifice to vent high quantity of air draining and filling of pipes. APPLICATION ► Water works. ► Water / Effluent / Sewage treatment plants. ► Fire Fighting. ► Power.