Posiwell ddb gate valves is designed with patented independent spring loaded discs patented seating design that compensate automatically when fluctuation of pressure and temperature occur thus providing positive proof of line segregation.
Posiwell dbb gate valve.
Designed by engineers with in depth understanding from over 3 decades of servicing repairing of traditional valves as dbb valves and modifying std.
Our dbb valves are made to api 6d 6a design construction api 6d asme b1610 face to face.
Posiwell dbb dib 1 full bore gate valve key feature of posiwell dbb dib 1 valves full bore max flow increase flow rate vs.
Valves to dbb type.
Posiwell patented full bore dual expanding discs gate valves are dbb double block bleed and dib 1 double insolation bleed valves.
Flotech performance systems are sole uk distributors for posiwell double block bleed gate valves.
With the most complete multi turn product line for a single source manufacturer our valves are produced to the.
Our product line includes.
Posiwell double block bleed gate valves have been designed by engineers at the forefront of valve service repair modifications and automation.
Posiwell patented double block and bleed dual expanding gate valves were designed by engineers with in depth understanding from 2 decades of servicing repairing of traditional dbb valves and modifying valves to dbb type.
There are two entities in the united states that define dbb api and osha.
With corrosion and chemical additives being one of the main caused of failure.
Posiwell double block bleed dbb gate valves posiwell double block bleed gate valves have been designed by engineers with over three decades of experience at the forefront of valve service repair modifications and automation and a deep understanding of the root causes of db b valve failures.
According to api a dbb valve is a single valve with two seating surfaces that in the closed position provides a seal against pressure from both ends of the valve with a means of venting bleeding the cavity between the seating surfaces.
Designed by engineers with in depth understanding from over 3 decades of servicing repairing of traditional valves as dbb valves and modifying standard valves to dbb type.
Double block and bleed dbb ball valve is made of two balls in one valve body.
Plug valves full bore allowing pipeline pigging large bottom cavity and drain for easy release of foreign particles entrapment.
This system is equivalent to a double isolation bleed dib single ball valve.
A bleeder is added between the two balls of the valve.
Posiwell patented full bore dual expanding discs gate valves are dbb double block bleed and dib 1 double insolation bleed valves.
Our experience gives a deep understanding of the root causes of double block bleed valve failures.
