12 Inch Ball Valve

A 12-inch ball valve is a large industrial valve designed to control the flow of liquids or gases in high-capacity piping systems. 

Size
12" (DN300)
Pressure Rating
Class 150-2500 (PN20-420)
Unit Price
$1215-$24000
Origin
China

Key Specifications

  • Size: 12-inch nominal pipe size (NPS), corresponding to the inner diameter of connected pipes.
  • Pressure Rating: Typically follows ANSI classes (e.g., Class 150, 300, 600) or API standards. Common in high-pressure oil/gas or water systems.
  • Material: 
    Body: Stainless steel (corrosion-resistant), carbon steel (durable for industrial use), brass (lower pressure), or PVC (chemical resistance).
    Seats/Seals: PTFE, elastomers (e.g., EPDM, Viton) for tight shut-off.
  • Connection Types: Flanged (common for easy installation), butt-weld (permanent, high-integrity), or threaded (rare for this size).

Types

  • Full Port (Full Bore): Bore matches pipe diameter, minimizing pressure drop—ideal for slurry or viscous media.
  • Reduced Port: Smaller bore, lower cost, but higher pressure loss.
  • Trunnion-Mounted: trunnion ball for high-pressure/large-scale applications (common for 12-inch valves).

Actuation Methods

  • Manual: Gear-operated or lever handles (for infrequent use).
  • Automated: Electric, pneumatic, or hydraulic actuators for remote/automated systems.

Applications

  • Oil & Gas: Pipeline isolation, refining processes.
  • Water/Wastewater: Mainline control, pumping stations.
  • Chemical/Power Plants: Handling aggressive fluids or steam.
  • Marine/Shipbuilding: Large piping systems.

 

12 Inch Ball Valve Dimensions

12 inch ball valve face to face dimensions (flanged RF)
10 inch ball valve end to end dimensions (welded ends)
10 inch ball valve face to face dimensions (flanged RTJ)
12 inch ball valve face to face dimensions (flanged RF)
12 inch ball valve end to end dimensions (welded ends)
12 inch ball valve face to face dimensions (flanged RTJ)

 

Inch mm Pressure Rating Face to Face Dimension, inch (mm)
(Full Bore and Reduced Bore Ball Valve)
Minimuma Bore Diameter
inch (mm)
Raised Face(A) Weld End(B) Ring Joint(C) Full Bore Ball Valve
12" DN300 Class 150 24.00 (610) 25.00 (635) 24.50 (622) 11.93(303.0)
12" DN300 Class 300 25.50 (648) 25.00 (635) 26.13 (664) 11.93(303.0)
12" DN300 Class 600 33.00 (838) 33.00 (838) 33.00 (838) 11.93(303.0)
12" DN300 Class 900 38.00 (965) 38.00 (965) 38.13 (968) 11.93 (303.0)
12" DN300 Class 1500 44.50 (1130) 44.50 (1130) 45.13 (1146) 11.30(287.0)
12" DN300 Class 2500 56.00 (1422) 56.00 (1422) 56.88 (1445) 10.43(265.0)

a There is no upper size limit for a valve bore

 

12 Inch Ball Valve Weight, in Kgs

Inch mm Pressure Rating Trunnion Mounted Ball Valve
(Full Bore)
Cast Steel Forged Steel
12" DN300 Class 150 475 705
12" DN300 Class 300 507 763
12" DN300 Class 600 820 855
12" DN300 Class 900 1018 1125
12" DN300 Class 1500 1338 1970
12" DN300 Class 2500 ... 3267

Note: All weights are for full-bore ball valves. 

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Valve type (ball, gate, globe, check etc.), valve size, pressure class, valve material, and end connection (flanged, butt welding etc.)