Ball Valves
A ball valve is a valve with a spherical disc, the part of the valve which controls the flow through it. The sphere has a hole, or port, through the middle so that when the port is in line with both ends of the valve, flow will occur. When the valve is closed, the hole is perpendicular to the ends of the valve, and flow is blocked. The handle or lever will be in line with the port position letting you "see" the valve's position. The ball valve, along with the butterfly valve and plug valve, are part of the family of quarter turn valves. Ball valves are durable and usually work to achieve perfect shutoff even after years of disuse. They are therefore an excellent choice for shutoff applications.
●The Types of Ball Valves
1. There are a few types of ball valves related to the attachment and lateral movement of the ball:
• A trunnion ball valve has additional mechanical anchoring of the ball at the top and the bottom, suitable for larger and higher pressure valves.
• A floating ball valve is one where the ball is not held in place by a trunnion. In normal operation, this will cause the ball to float downstream slightly. This causes the seating mechanism to compress under the ball pressing against it. Furthermore, in some types, in the event of some force causing the seat mechanism to dissipate (such as extreme heat from fire outside the valve), the ball will float all the way to metal body which is designed to seal against the ball providing a somewhat fail safe design.
2. Based on how the pieces of the valve - especially the casing that contains the ball itself are manufactured and assembled, there are five general body styles of ball valves.
• single body
• three piece body
• split body
• top entry
• welded
WPP provides all types of ball valves above.
  Size: 1/2" to 56"
  Pressure Rate:Class 150 to Class 2500
  Material: Cast steel, Forged steel, Carbon steel, Stainless steel, Duplex stainless steel, Low temperature steel and various alloy steel. WCB, A105 CF8, CF8M, CF3, CF3M, F304, F316, F304L F316L LCB LF2 F51.
  Test: API 6D API 598. Marking: MS SP-25
  Actuation: Lever, Worm Gear, Electrical, Pheumatic, Hydraulic
●Design Feature
  Reliable Seat Seal
  Double Block and Bleed
  Anti-static Design
  Blowout Proof Design
  Fire Safe Design