Bonnet​
• The Bonnet of Gate Valve are designed in such a way that Integral Back-Seat as well as Threaded Back-Seat options are available to offer as per customer requirement.
• The Bonnet also houses the Yoke Sleeve & Stuffing Box assembly both of which are precisely machined to give proper alignment to the stem & the wedge during sealing.

​Body / Bonnet Joint​
• The Body-Bonnet Joint Gasket is made up of Graphite reinforced by SS Ring so that it can handle high pressure & prevent any leakage pass through it.
• The Body – Bonnet Joint is tightly sealed with the help of standard Studs & Nuts as per the Bolting Calculation to prevent any leakage past the joint under maximum operating pressure for which the valve is designed for.

​Wedge​
• Lubi Gate Valve Wedge is casted one piece. It has internal guide slots which is used for guiding through the Body Guide Ribs for proper alignment.
• We offer flexible wedge which ensures proper & tight sealing at a wide range of pressure-temperature range without any effect of stress concentration or deformation to the component.
• The thrust generated from stem to wedge is applied towards the center of the wedge at the time of sealing. This ensures uniform operation of thrust & reduction in torque while obtaining a clean leak free seal.

​Seat Ring
• Lubi Gate Valves come with a seal welded Seat Ring which offer tight leakproof seal without any deformation or loosening at high pressure – temperatures compared to threaded seats. Also, the chance of leakage past the Body & Seat gets eliminated with seal welded seats.
• For Stainless Steel MOC’s we also offer integral Seats which are integral with the Body Casting & are machined to behave as Seats for providing sealing.

​Stem​
• Lubi Gate Valve has a Stem which is of one piece construction.
• It has smooth machined surface & ACME Threads made using precision machinery & tooling in order to increase life of the stem as well as to minimize leakage, friction & thus torque.
• Lubi Gate Valves has head of the stem T – Shaped which gets slotted in the T-Slot of the Wedge & thus prevents any free rotational movement of the Wedge during opening & closing. It also has a Back-seat chamfer which matches the degree of the Back0seat Bush in the bonnet to prevent any leakage past through it.

​Yoke Sleeve​
• It is made up of either Cast Ductile Iron Grade D2 or Aluminum Bronze material in order to provide corrosion resistance, heat resistance & prevent & wear.
• It has long thread engagement as per Standard API 600 which provide proper alignment of the stem.

​Stem Packing Box​
• The Packing Box contains space for stem packing & is machined as per the precise tolerances given by Design. The surface finish is also closely controlled in order to prevent any leakage of steam / fluid past through it.
• Seven numbers of Gland Packing are provided in the Stem Packing Box. The two ends of the packing are of Graphite cross-plaited packing & the middle 5 are of compressed graphite packing rings.