Douglas Chero Forged Steel and Forged Stainless Steel Globe Valve

Douglas Chero globe valve

Material could be forged steel or forged 316 SS
Body joining: Bolted and Welded bonnet (seal or full penetration), Bonnetless and Pressure seal Execution
Straight, Y pattern & Angle, Bellows Seals, Cryogenic service, Vacuum service, OS&Y, ISRS, …
Motorized with Electric, Pneumatic actuators,…

Sizes: 1/4” to 2” reduced and full bore (Urea service up to 8″)
End connections: SW, Threaded, BW, Hub and Flanged (integral type)
Rating: ANSI class150 to 4500 lbs

Materials:
Carbon steel – ASTM A105
Killed Carbon steel – ASTM A350 / LF2
Alloy steel – ASTM A182 – F5, F9, F11, F22, F91
Stainless steel – ASTM A182/F304(L), F316(L), F317, F321, F347, F44
Duplex – ASTM A182/F51, F53, F55

NOTE:
Usually people use globe valve for superheated steam
But some people use globe valve to regulate the flow of the steam
So they open the valve only half
When the valve is open half, the orifice opening inside the globe valve become smaller
Resulting the superheated steam’s speed become enormously high and there will be erosion by the superheated steam inside the valve.
In the end the steam can erode the thread of the valve’s seat area too and the seat will be gone

To solve this superheated steam problem, we can use a globe valve with integral stellite seat
(there is no stellited seat screwed on the valve;’s body anymore)
Factory will weld a thick stellite material directly on the valve’s seat area of the globe valve body.
So there is no possibility for the steam to erode the integral stellite seat via the thread of the seat
Because now there is no more threaded seat there

For very severe case of superheated steam erosion & abrasion on the body of the globe valve
We can offer you the globe valve with A182-F91 material that is suitable for this severe application
(with integral stellite seat on the body)