Vee Ess And Co.

INTRODUCTION
Leader Butterfly Valves are designed to meet the flow control requirement of plumbing, fire-fighting and HVAC application. The body seat is vulcanised in-situ onto the body and offers 100% bi-directional sealing. The wafer style body has universal design to fit between flanges of all almost all standards.

• Design Standard: IS 13095.
• Wafer type design makes it compact and take lesser space.
• Dynamic sealing of concentric disc is obtained with vulcanised rubber seat at very low torque.
• High-precision disc external profile for smooth operation & tight shut-off sealing with low operating torque.
• Moulded rubber body seat extending onto the contact faces ensures perfect sealing and eliminates the need for separate flange gaskets.
• Notch plate ensures the locking of the hand lever at different position in addition to open and closed positions.
• Shaft sealing is ensured by double sealing of Bush and °0’ ring combination.
• Body castings made of superior FG 260 grade cast iron to ensure additional strength.
• Valve disc made of ductile iron with epoxy coating offers high strength against pressure.
• Shafts made of martensitic stainless steel to ensure maximum strength and torsional rigidity.
• Two-piece stem design which is precisely guided between the PTFE bush & Rubber ’O’ Rings to prevent leakage, corrosion, and stem seizure.
• Taper disc holder pins to ensure shockproof shaft to disc connection & suitability of replacement at field.
• Easy visual control of open/closed position marked on the notch plate.
• Operation mode manual, gear, electric, pneumatic.
• Available with locking arrangement on request.
• Temper Switch / supervisory limit switches option available on request.
• Top flange as per ISO 5211 to suit F Series flanges of Gears and Actuators.

End Details : Suitable for Clamping Between Flanges as per ANSI B 16.1 CL-125

INTRODUCTION
Leader Butterfly Valves are designed to meet the flow control requirement of plumbing, fire-fighting and HVAC application. The body seat is vulcanised in-situ onto the body and offers 100% bi-directional sealing. The wafer-style body has universal design to fit between flanges of all almost all standards.

• Design Standard: BS 5155, EN 593, API 609 CAT. A.
• Wafer type design makes it compact and take lesser space.
• Dynamic sealing of concentric disc is obtained with vulcanised rubber seat at very low torque.
• High-precision disc external profile for smooth operation & tight shut-off sealing with low operating torque.
• Moulded rubber body seat extending on to the contact faces ensures perfect sealing and eliminates the need for separate flange gaskets.
• Notch plate ensures the locking of the hand lever at different positions in addition to open and closed positions.
• Shaft sealing is ensured by double sealing of Bush and ’0’ ring combination.
• Body castings made of superior FG 260 grade cast iron to ensure additional strength.
• Valve disc made of ductile iron with epoxy coating offers high strength against pressure.
• Shafts made of martensitic stainless steel to ensure maximum strength and torsional rigidity.
• Two-piece stem design which is precisely guided between the PTFE bush & Rubber ’O’ Rings to prevent leakage, corrosion, and stem seizure.
• Taper disc holder pins to ensure shockproof shaft to disc connection & suitability of replacement at field.
• Easy visual control of open/closed position marked on the notch plate.
• Operation mode manual, gear, electric, pneumatic.
• Available with locking arrangement on request.
• Temper Switch / supervisory limit switches option available on request.
• Top flange as per ISO 5211 to suit F Series flanges of Gears and Actuators.
• End Details : Suitable for Clamping Between Flanges as per ASME/ANSI B 16.1 CL-125

INTRODUCTION
Leader Butterfly Valves are designed to meet the flow control requirement of plumbing, fire-fighting and HVAC application. The body seat is vulcanised in-situ onto the body and offers 100% bi-directional sealing. The wafer-style body has universal design to fit between flanges of all almost all standards.

• Design Standard: IS 13095.
• Wafer type design makes it compact and take lesser space.
• Dynamic sealing of concentric disc is obtained with vulcanised rubber seat at very low torque.
• High-precision disc external profile for smooth operation & tight shut-off sealing with low operating torque.
• Moulded rubber body seat extending onto the contact faces ensures perfect sealing and eliminates the need for separate flange gaskets.
• Notch plate ensures the locking of the hand lever at different positions in addition to open and closed positions.
• Shaft sealing is ensured by double sealing of Bush and °0’ ring combination.
• Body castings made of superior FG 260 grade cast iron to ensure additional strength.
• Valve disc made of SS304 offers high strength against pressure.
• Shafts made of martensitic stainless steel to ensure maximum strength and torsional rigidity.
• Two-piece stem design which is precisely guided between the PTFE bush & Rubber ’O’ Rings to prevent leakage, corrosion and stem seizure.
• Taper disc holder pins to ensure shockproof shaft to disc connection & suitability of replacement at field.
• Easy visual control of open/closed position marked on the notch plate.
• Operation mode manual, gear, electric, pneumatic.
• Available with locking arrangement on request.
• Temper Switch / supervisory limit switches option available on request.
• Top flange as per ISO 5211 to suit F Series flanges of Gears and Actuators.

END CONNECTION

• Suitable for Clamping between flanges as per ASME B16.1 Class- 125, ASME B16.5 Class-150, IS 6392, Table 17, IS 1538, BSEN 1092 PN25, BS:10 Table D, E, F, H.

UTILISATION & SERVICE

• Best suited for water, HVAC, fire-fighting.

WORKING PRESSURE

• Maximum Working Pressure: 16 Bar.

INTRODUCTION

Leader Swing Check Valves are designed with high sensitivity to pressure so that the valve closes immediately before significant fluid starts flowing backward. Fluid reversing backward causes damage to equipment like boilers or pumps. The valve is activated by the flowing material in the pipeline. The pressure of the fluid passing through the system opens the valve, while any reversal of flow will close the valve. Closure is accomplished by the weight of the check mechanism, by back pressure. Entirely automatic in action, depending upon differential pressure and velocity of flow within the line to perform their functions of opening and closing.

• Design Std.: DIN EN 12334.

Bolted Cover, Swing Disc design.\
Metal to Metal seating.
Gun Metal Body & Disc rings.
Design Prohibits Galling or Scoring of Seating Surfaces.
One-Piece Disc Construction Designed to Withstand Severe Service Conditions.
Large Bolted-On Cover Provides Easy Access to Interior for Routine Maintenance.
Rigid & Sturdy design.
Long service life as wear is minimal which makes it highly reliable.

• Valve is mechanically automatic and thus it does not need an actuator or valve operator.
• A horizontal or vertical duct can be used, easy to install.
• The valve must be installed in the direction of the flow arrow.
• Flanged ends as per ASME B16.1 CL-125 (FF).
• Valves are available with IBR Certification up to size 200mm.
• Widely applied for low-pressure and ambient-temperature utility services such as water supply, power plants, gas supply, district heating piping, irrigation projects, air conditioning systems, as well as food processing industry, chemical and petrochemical industry, Boiler industry, pharmaceutical, and powder industry to prevent the backflow.

INTRODUCTION

• Leader Ductile Dual Plate Check Valves are automatic, quick-acting valve designed to prevent the reversal of flow in a piping system. The two valve discs, eccentrically embedded, have springs which force the valve to close in case no pressure is available. The pressure of the fluid passing through the system opens the valve discs, while any reversal of flow will close the valve discs. Closure is accomplished by the spring action and by back pressure.
• Design Standard: API 594.

Retainer-less Construction ensures that they do not drill entirely into the valve body to allow the hinge pin and the stop pin to be fitted with a dual-plate check valve. The feature ensures high integrity & tamper-proof design, ensures no leakage from the body.

• Body & Disc castings made of superior Ductile Iron ASTM A395 grade to ensure additional strength.
• Wafer type design, to take lesser space than the Reflux / Swing Check Valve.
• Being light in weight has more rugged construction than the standard Swing Type Check Valve, which needs expensive foundation and special supports.
• Less wear and tear of seat surface due to resilient integrally moulded body seating face.
• Stopper pin prevents the discs from coming into contact with each other and thus prevents disc damage. The stopper pin also prevents spring failure by ensuring that the discs don’t travel beyond the full-open position.
• Low cracking pressure design (operable at low pressures).
• Independent spring design feature also available which gives less scrubbing of disc & independents movement of discs.
• Inherently non-slamming, no external devices/attachment required.
• Water hammering effect is minimized in this design since the closing of valve does not depend upon any back pressure or flow.
• Either vertically (only upwards) or horizontally installed.
• Lifting eyebolt option is provided.

End Details : Wafer Type Suitable For  Insertion Between Flangs as Per BSEN 1092 PN-25 Test Pressure : B.T.P. - 37.5 Bar (Hyd.) : S.T.P. - 27.5 Bar (Hyd.)

INTRODUCTION

Leader forged steel check valve is to provide with single disc. With the force of medium, the disc will automatically open or close. When the media stops the flow, the disc will be closed under its own force. No manual intervention is involved in the whole process Check valve is mainly to prevent the media reverse flow and ensure one-way flow of media channels only. It prevents accidents while a sudden loss of power in the pipeline medium such as the power equipment like pump damages, and the medium reserve flow against power source.

• Design Std.: BS 5352, BSEN ISO 15761.
• Pressure Temperature Rating as per ASME B16.34, BSEN ISO 15761.
• Sturdy design for high-pressure & temperature service.
• Bolted body-cover design, Valves with welded cover also available on request.
• Bolted body-cover joints provided with spiral-wound stainless steel gasket and graphite filler for protection against leaks.
• Piston/Disc is guided in the Cover assuring accurate return to seating to achieve leak tightness.
• Spring-loaded disc on check valves suitable for non-horizontal applications too available on request.
• Minimum differential pressure of 1 bar required for operating the valve.
• Flanged ends as per ASME B16.5 Raised Face.
• Spring-loaded disc on check valves available for non-horizontal applications.
• Low-Temperature Carbon Steel & Austenitic SS forging for body and cover design qualified as per BS 6364 for Cryogenic service available on request.
• Valves can be offered to NACE MR-0175 and other special NACE requirements.
• Valves are available with IBR certification.
• Type of Seat : Renewable Type of Disc : Renewable Disc Trim : SS (ASTM 276 TYPE 410) Fastener : Alloy Steel (Gr B7/Gr 2H) Gasket : Sprial Wound SS 304 with Graphoil Filler End Details : Welded On Flanges as Per ASME B16.5 CL-150 R.F. (Drilled) Serrated Test Pressure : B.T.P. - 30 Bar Hyd. : S.T.P. - 22 Bar Hyd.

PRODUCT DETAILS

SCREWED IN BONNET , INSIDE SCREW,
NON RISING STEM, INTEGRAL SEAT & STURDY HAND WHEEL.

END DETAILS

FLANGED ENDS TO BS:10, TABLE ‘D’

WORKING

SUITABLE FOR NON -SHOCK HYDRAULIC LINE TEMP.UPTO 45ºC

TESTING (HYD.)

BODY TEST PRESSURE :- 300 psig.
SEAT TEST PRESSURE :- 200 psig.