Valve testing api 598 fire safe testing api 607 iso 10497.
Metal seated ball valve torque chart.
The theory behind the 0 67 or 67 valve torque factor when sizing is.
Erode the seat and metal parts.
The complete valve assembly demonstrates high repeatability in terms of sealing rate b factory tested low torque and smooth operation at various temperatures and pressures.
Sizing torque requirements and technical data.
Larger sizes and unique material requirements are available upon request.
Actuators on soft seated valves.
The following explains why this factor is used and how it works.
Krombach metal seated ball valve s ball and seat are machined to such precise tolerances that ball and seat lapping does not have to be performed individually for each valve making both the ball and seat freely interchangeable if equal in nominal size.
Dn øp l l1 ør n x øs øt h m iso 5211 b c i j torque kv 15 15 11553 65 4x1495 110 164f05 11 2 5 7 m12x1 5 9 2 8 26 20 20 20 12052 75 4x14105 117 164f05 13 2 9 2 m12x1 5 9 3 6 35 40.
Created by the industry s leading design engineers with over 50 years of experience in metal seated valve services the tvc sst valve team can solve your power problems.
It has a low coeffi cient of friction for lowering valve torque.
Jc can produce the following metal seated ball valves.
High speed steam may carry water droplets dissolved gases and other suspended solids.
Valves see special catalog vel ms.
The friction points in a floating ball valve are the stem and the ball seat.
Krombach metal seated ball valves are ideal for the refining power generation and oil and gas industries.
The soft seated ball valves are factory tested.
Velan memoryseal ball valves can be equipped with electric pneumatic hydraulic or gear actuators.
In sizes from 1 2 to 2 1 2 the isolation valve is designed for the limited class rating up to 4500 class.
See pages 35 to 43 for actuator.
The torque required to operate a ball valve is a function of friction between the valve s metal parts and its soft sealing materials.
T series reduced operating torque asme 150 2500 class the mogas t series trunnion mounted ball valve is available in either metal seated and soft seated from 3 to 60 inch and two or three piece designs with operating temperature from 50 f to 400 f 45 to 204 c.
It is good for service temperatures ranging from 320 f to 550 f black 10 y.
Metal seated vall valves are mainly used for heavy duty applications.
Ach ball and seat sub assembly is accurately machined ground and then mate lapped for a perfect match.
