Manual Ball Valves

Brass Nickel Plated Full Bore Ball Valve 600WOG

Brass Nickel Plated Full Bore Ball Valve 600WOG

Sale price £1.56
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Mini Ball Valve Male x Female

Mini Ball Valve Male x Female

Sale price £1.68
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Mini Ball Valve Female x Female

Mini Ball Valve Female x Female

Sale price £1.68
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Gas Approved Ball Valve - EN331

Gas Approved Ball Valve - EN331

Sale price £2.72
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WRAS Approved Brass Ball Valve

WRAS Approved Brass Ball Valve

Sale price £2.72
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2 Piece Full Bore Stainless Steel Ball Valve

2 Piece Full Bore Stainless Steel Ball Valve

Sale price £6.30
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PVC-U Ball Valve Double Union

PVC-U Ball Valve Double Union

Sale price £6.50
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1 Piece Reduced Bore Stainless Steel Ball Valve

1 Piece Reduced Bore Stainless Steel Ball Valve

Sale price £7.52
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3 Piece Full Bore Stainless Steel Ball Valve

3 Piece Full Bore Stainless Steel Ball Valve

Sale price £8.95
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2 Piece Full Bore Stainless Steel Ball Valve 2000psi

2 Piece Full Bore Stainless Steel Ball Valve 2000psi

Sale price £11.17
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3 Piece Full Bore Stainless Steel Ball Valve Direct Mount

3 Piece Full Bore Stainless Steel Ball Valve Direct Mount

Sale price £18.54
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PN16 Flanged Cast Iron Full Bore Ball Valve

PN16 Flanged Cast Iron Full Bore Ball Valve

Sale price £38.80
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ANSI150 Flanged Stainless Steel Full Bore Ball Valve

ANSI150 Flanged Stainless Steel Full Bore Ball Valve

Regular price £42.65
Stainless Steel 3 Piece Full Bore Fire Safe BSP Direct Mount Ball Valve

Stainless Steel 3 Piece Full Bore Fire Safe BSP Direct Mount Ball Valve

Regular price £43.90
PN16 Flanged Stainless Steel Full Bore Ball Valve

PN16 Flanged Stainless Steel Full Bore Ball Valve

Sale price £48.95
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3 Piece Stainless Steel Full Bore Ball Valve Hygienic Clamp Ends

3 Piece Stainless Steel Full Bore Ball Valve Hygienic Clamp Ends

Sale price £49.50
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3 Piece Stainless Steel Full Bore Ball Valve Hygienic OD Butt Weld Ends

3 Piece Stainless Steel Full Bore Ball Valve Hygienic OD Butt Weld Ends

Sale price £54.00
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ANSI150 Flanged 2 Piece Stainless Steel Fire Safe Full Bore Ball Valve

ANSI150 Flanged 2 Piece Stainless Steel Fire Safe Full Bore Ball Valve

Regular price £61.50
PN16/40 Flanged 2 Piece Stainless Steel Fire Safe Full Bore Ball Valve

PN16/40 Flanged 2 Piece Stainless Steel Fire Safe Full Bore Ball Valve

Regular price £79.95
Stainless Steel OD Butt Weld Hygienic 3 Way Full Bore Ball Valve L Port

Stainless Steel OD Butt Weld Hygienic 3 Way Full Bore Ball Valve L Port

Regular price £197.70
Stainless Steel OD Butt Weld Hygienic 3 Way Full Bore Ball Valve T Port

Stainless Steel OD Butt Weld Hygienic 3 Way Full Bore Ball Valve T Port

Regular price £197.70
ANSI150 Flanged Stainless Steel 3 Way L Port Full Bore Ball Valve

ANSI150 Flanged Stainless Steel 3 Way L Port Full Bore Ball Valve

Sale price £209.26
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ANSI150 Flanged Stainless Steel 3 Way T Port Full Bore Ball Valve

ANSI150 Flanged Stainless Steel 3 Way T Port Full Bore Ball Valve

Sale price £209.26
Save £106.79
PN16 Flanged Stainless Steel 3 Way L Port Full Bore Ball Valve

PN16 Flanged Stainless Steel 3 Way L Port Full Bore Ball Valve

Sale price £220.40
Save £95.65
PN16 Flanged Stainless Steel 3 Way Ball Valve T Port Full Bore

PN16 Flanged Stainless Steel 3 Way Ball Valve T Port Full Bore

Sale price £220.40
Save £95.65



Manual Ball Valves


Ball Valves

 

Ball valves are durable, reliable and securely shut off flow even after sitting idle for long periods of time. Because of this, they are frequently used as fluid and gas flow cut-off valves. Ball valves are also easy to operate. This plus their availability in a range of useful material options has led to their widespread use.

 

The principle of how Ball valves work is the same as any valve in that it controls the flow of water through it and has a handle to stop the flow when required. It is called this because of its ball or sphere closure unit inside the valve which opens and closes when the lever is turned, controlling flow. A ball valve is a form of quarter-turn valve which uses a hollow, perforated and pivoting ball to control flow through it. It is open when the ball's hole is in line with the flow and closed when it is pivoted 90-degrees by the valve handle.

 

So a Ball valve is a quarter turn operated valve. The closure member is a spherical plug with a through hole. When the valve is in open state, the through hole is in-line with the fluid flow and hence, the fluid passes through it. The valve is closed by rotating the globe by 90 Degrees. such that the hole now becomes perpendicular to the flow and hence, stops the flow. 

The seat is usually circumferential, made up of soft materials to offer a tight shutoff. The seat can be made either out of plastic or metals. Ball valves are not recommended to be used in a partially open condition. Due to misalignment between the flow direction and opening of the plug, large pressure drop takes place in partially open condition. 
Due to above specified challenges, ball valves are mostly used in shutoff applications. Ball valves are commonly used in steam, water, oil, gas, air, corrosive fluids. They can handle slurries and dusty dry fluids. Ball valves are not used with abrasive and fibrous materials as it poses risk of damage to the seat and plug surface.

 

 Ball Valves provide tight shut-off and predictable control. They have a high range of use due to the design of the regulating element, without the complications of side loads typical of butterfly or globe valves. Advantages include ease of operation and high flow, high pressure, and high temperature capabilities. Disadvantages include low cleanliness and an inability to handle slurries.