What is a backseat of Gate Valve
What is a backseat?A backseat is a seating arrangement inside the bonnet. It provides a seal between the stem and bonnet and prevents system pressure from building against the valve packing when the valve is fully open. Back seats are often applied in gate and globe valves (source: wermac.org). How to use the backseat? The backseat should only be used to isolate the gland packing from the line medium for example when gland packing leakage is evident and until the valve can be de-pressurised and repaired. How to not use the backseat? Under no circumstances should the backseat be used to allow gland packing […]
What is the difference between floating ball valve and Trunnion Ball Valves?
What is the difference between floating ball valve and Trunnion Ball Valves? The ball of the floating ball valve is floating. Under the action of medium pressure, the ball can produce a certain displacement and press tightly on the sealing surface of the outlet end to ensure the sealing of the outlet end. The […]
What is a Y strainer?
There are styles of strainers, basket and y. The y strainer is generally used wherein there’s a small quantity of cloth to be amassed. This strainer may be established inside the horizontal or vertical […]
What’s The Difference Between Carbon Steel And Cast Iron?
What’s The Difference Between Carbon Steel And Cast Iron? Carbon steel is an iron – carbon alloy with a carbon content of 0.0218% to 2.11%. Cast iron generally has a carbon content of 2.5% to 3.5%. Carbon steel castings has relatively good strength and toughness and is used to manufacture various mechanical parts and metal […]
What is the material of WCB / LCB / LCC / wc6 / WC9 in the valve？
WCB / LCB / LCC / wc6 / wc9 are commonly used materials for valves, but many people don’t know what they mean. Let’s introduce these materials in detail today W. Wrought casting; C-carbon steel; A. B, C indicates the strength value of steel grade from low to high WCA, WCB and WCC represent carbon […]
