Alphacon Cast Steel Gate Valve are designed to conform to API 600, ISO 10434, BS 1414 and ASME B16.34
Wall Thickness : API 600, API 6D
Face To Face : ASME 16.10, BS 2080, and ISO 5752
Flange End : ASME B16.5 for 2" – 24"
ASME B16.47 series A or B for 26" and larger
BW End : ASME B16.25
Inspection & Test : API 598, BS EN 12266, API 6D
All castings for valve productions are manufactured in our own foundry facility. Raw materials purchased are
carefully inspected before proceed to production to ensure conforms to the standard & required specifications that
meet ASTM, JIS, BS, DIN, etc.
Bodies are designed to provide a minimum pressure drop and have a sufficient wall thickness to withstand the
torsion forces and stresses normally encountered in piping systems and to compensate for erosion and corrosion
Bonnets are designed in various types to meet the valve body & operational requirements and connections are either
flat face, groove for gasket, ring joint faces. Pressure Seal Bonnet available for Class 900 / 1500 / 2500.
DISC / GATE / WEDGE
All the gate has tapered H cross-section and are fully guided to the seats. Solid Flexible gate is cast or
machined with circumferential groove to allow the seating surface to move independently and adjust movement of the
Integral seats or Forged steel seat is machined and surface is overlay with hard alloy specified by the customer.
Seat is either threaded or welded onto valve body.
All our gate valve have the back seating design and is renewable. For stainless steel gate valve, the back seat is
Stems are made in one piece forging with T-head and precision ACME Threads.
The stem nut arrangement and design allows for the removal of handwheel at the open position and will not drop
into close position. Thrust Bearings are provided in the stem nut arrangement for large size valves.
Class 150 : Jacketed Graphite with Stainless Steel
Class 300 / 600 : Spiral Wound Graphite with Stainless Steel
Class 900 : Ring Joint Metal
Other gasket materials are also available and are selected generally according to application pressure & temperature.
Die-formed graphoil with braided graphite yarn with corrosion inhibitor is standard materials, other special
materials are also available optionally.
Gland has two-piece construction for easy alignment.
Gate valves are generally supplied with Hand Wheel operator, having "Open" & "Close" identification. Gear
Operator, Electric Motor Actuator or Cylinder Actuator for remote operation are available on request.
Minimum 125RMS surface finish, cylindricity and vertically precission controlled according to Alphacon design and manufactured standards.