Gate valves - probably the most common valves in use today, esp. where an uninterrupted flow is required, because the gate fully retracts into the bonnet, creating a minimal pressure drop, when the valve is in an open position. Gate valves are specifically intended for use in isolation applications.
Globe valves -the main advantage is that a globe valve opens more rapidly than a gate valve as the disc only needs to move a small distance from its seat to allow full flow. This is an advantage when there is frequent operation of the valve. The disadvantage is that the fluid has to change course, increasing the resistance to flow and generating turbulence. This results in a higher pressure drop across a globe valve than a gate valve. Globe valves are designed to close off, open up or throttle the flow in a pipeline.
Another very effective type of Bonnet construction, apart from the standard Bolted Bonnet type in a gate/Globe valve is the Pressure Seal Bonnet. This construction is adopted for valves for high to very high pressure service. The unique feature about the pressure seal bonnet is that the Body - Bonnet joints seal improves as the internal pressure in the valve increases, compared to other constructions where the increase in internal pressure tends to create leaks in the body-bonnet joint.
Power Stations, Thermal & Cogeneration Power Plants, Nuclear Power Plants, Petrochemical ,Chemical, Process and other General Industries, Sugar, Refineries , Fertilizers, Steel, Off-Shore & On-Shore Platforms.
Media of applications include: Water, Steam [Saturated / Superheated] Oil and Gas, Hydrocarbons, NACE and Sour Services, LNG & Natural Gas, Oxygen and Hydrogen Services and many other Aggressive and Non Aggressive applications.
All valves up to 40mm are Outside Screw and Yoke, Welded Bonnet type, rising stem renewable seat, for Gate valves. Globe valves will have Integral seat.
All valves 50mm and above are Outside screw and Yoke, Rising Stem and with Pressure Seal Bonnet.
Gate Valves shall be with Flexible wedge type Gate. Globe Valves shall have Conical type Disc.