300MW Main Stop Valve

Fully assembled three port MSV in 2.25Cr1Mo steel. Goodwin manufacture all the castings and machined items and fully assemble the unit.

The seats are weld overlaid with 12Cr material using robotic welding techniques. Before despatch lift tests are carried out on the spring lifters to ensure the correct travel to clear the regulator seats. Hydro pressure testing is carried out at 5,250psi

The main body casting weighs 7,000kg and the assembled unit is 15,700kg.

Recently Goodwin has supplied 76off 3 port and 20off 2 port main stop valves.

CMM inspection of 300MW Main Stop Valve body

Dimensional inspection is carried out on a large 3 axis gantry co-ordinate measuring machine (CMM).
XYZ-axis 5 x 3 x 2 metre.

Calibrated to 6mm-1 with accuracy to 6 decimal places

Inspection of a 20inch re-heat valve for the recirculation of steam between the low and high pressure turbines

This item is produced as a three-casting fabrication welded assembly; it is welded, painted and machined in house.

The finished fabrication weighs 9,300kg and has been supplied to customers in the USA, Korea and Japan.

The 20inch re-heat valve held in a machining jig on a Toshiba TSS-30-55B vertical boring machine

As are most of Goodwin machines the vertical borer is CMM controlled with tool changer and live spindle. It has a maximum turn diameter of 236 inches and turn height of 102 inches.    

300MW MSV manifold with two stop valve castings

This unit weighs 17,600kg and is supplied in the finish machined condition. The manifold has four forgings fabricated on and the stop valves each have one forging fabricated on; the stop valves are then welded to the manifold.

A fabricated CRV is supplied with each main stop valve the combined weight is 25,000kg.

600MW RSV-IV

This reheat stop and intercept valve consists of two IV castings welded to a RSV casting.

After fabrication welding the unit is finish machined and then assembled.

A fully assembled 600MW RSV-IV with the stand for shipping

hese valves are supplied with actuator arms and regulators.
Pressure testing is carried out at 1,550psi.

A total of 20 unassembled and 44 assembled valves have been supplied to two turbine manufacturers.

The ship weight of the assembled valve is 23,000kg.

This 600MW two port MSV is manufactured from two large castings which are joined by submerged arc welding

The regulator weld ends are overlaid using robotic welding.

600MW MSV's are supplied in CrMoV and 9.5Cr steel for supercritical applications .

Each fully assembled 600MW MSV weighs 18,400kg

They are supplied with all interface connections and the holding stand.

Pressure testing is carried out at 7,000psi.

A total of 44off  assemblies have been supplied.

Thread milling the bonnet flange bolting holes on a 12inch steam valve

Over 210 steam valves from 7inch through to 18inch have been supplied to the UK, the USA, China, Japan, Korea and Germany.

Dimensional inspection of a valve head (bonnet) for a 12inch steam valve

These type of heads are typically supplied as forgings. Goodwin worked with the customer to enable them to be converted to castings. This supply route saved cost and delivery time over the forgings.

Cast heads have been supplied for valves from 7 to 30inch and up to 4,000kg in weight.

135MW combined MSV and CV

28 of these assembled 135MW units have been supplied.
Three castings are fabricated together to make the main stop and control valve. The valves are assembled and supplied with the stand.

330MW MSV and interceptor valves

These valves are manufactured from a combination of castings and forgings fabricated together by welding.They are shown undergoing intermediate hardness testing inspection after the post-weld heat-treatment.

Ship weight of one unit is 12,600kgs.

300MW RSV-IV

A total of 76 assemblies of these 300MW combined reheat stop and intercept valves have been supplied. 56 of them fully assembled and the balance in the finish machined and un-assembled condition.

Pressure testing is carried out at 1,500psi. The unassembled weight is 8,500kg and each assembled unit is 13,500kg.