Forged Valve Bodies & Bonnets
A valve body must hold pressure across a complex internal cavity while resisting thermal cycling and, often, corrosive media. Forged bodies are specified over cast wherever leakage risk is unacceptable, because there is no porosity network to leak through.
- Body Size Range
- 15 NB – 300 NB
- Pressure Classes
- 150# – 1500#
- Materials
- A105, F11, F22, F304, F316
- NDT
- UT, MPI, DP as specified
- Machining
- Seats, stem bore, end connections
- Applications
- Oil, gas, water, chemical process
Forged Valve Bodies & Bonnets at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Body Size Range: 15 NB – 300 NB
- Pressure Classes: 150# – 1500#
- Materials: A105, F11, F22, F304, F316
- NDT: UT, MPI, DP as specified
- Machining: Seats, stem bore, end connections
- Applications: Oil, gas, water, chemical process
Pressure Integrity Without Porosity
Interconnected porosity in a casting can form a leak path invisible on the surface. Forged bodies have no such path, which is why API and ASME work in critical service so often specifies forged construction.
- No interconnected porosity
- Uniform wall properties
- Withstands thermal cycling
- NDT verified before dispatch
Machining the Internals
Seat pockets, stem bores, bonnet flanges and end connections are machined with concentricity held between the bore and the seating face, since it is that relationship that determines whether the valve seals at low differential pressure.
Materials for Aggressive Service
A105 for general duty; F11 and F22 for elevated temperature; F304, F316 and duplex grades where corrosion resistance governs. Each grade is spectro verified before it enters production.
People also ask
Why do codes prefer forged valve bodies?
Interconnected porosity in a casting can form a leak path through the pressure boundary. Forged bodies have no such path, which is why critical service specifications so often prohibit castings.
Do you machine valve bodies completely?
Yes, including seat pockets, stem bores and end connections, with concentricity between bore and seating face verified.
Topics covered on this page
- forged valve body manufacturer India
- valve bonnet forging supplier
- gate valve forging Rajkot
- forged valve components Gujarat
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
Why are valve bodies forged instead of cast?
+
To eliminate porosity leak paths and get uniform wall properties. Critical-service specifications frequently prohibit cast bodies for exactly this reason.
Do you machine valve bodies completely?
+
Yes, including seat pockets, stem bores and end connections, with concentricity verified.
What NDT is performed?
+
Ultrasonic, magnetic particle or dye penetrant testing per your specification, with certified reports.
Can you work to API specifications?
+
Yes, we manufacture to customer specifications including API-referenced requirements, with documentation to match.