Metal seated vall valves are mainly used for heavy duty applications.
Metal seated ball valve torque chart.
The torque required to operate a ball valve is a function of friction between the valve s metal parts and its soft sealing materials.
Erode the seat and metal parts.
Mogas standard metal seated isolation and rotary control ball valves range in size from 42 and are available in 150 to 4500 asme pressure classes.
For securaseal metal seated ball.
Valve testing api 598 fire safe testing api 607 iso 10497.
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.
The theory behind the 0 67 or 67 valve torque factor when sizing is.
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.
Velan memoryseal ball valves can be equipped with electric pneumatic hydraulic or gear actuators.
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.
Jc can produce the following metal seated ball valves.
The soft seated ball valves are factory tested.
It has a low coeffi cient of friction for lowering valve torque.
The following explains why this factor is used and how it works.
It is good for service temperatures ranging from 320 f to 550 f black 10 y.
High speed steam may carry water droplets dissolved gases and other suspended solids.
When sizing rack and pinion pneumatic spring return actuators a multiplier may be applied to the published ball valve torque.
Valves see special catalog vel ms.
Larger sizes and unique material requirements are available upon request.
In sizes from 1 2 to 2 1 2 the isolation valve is designed for the limited class rating up to 4500 class.
The friction points in a floating ball valve are the stem and the ball seat.
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.
See pages 35 to 43 for actuator.
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.
Ach ball and seat sub assembly is accurately machined ground and then mate lapped for a perfect match.
