Flanged V type pneumatic ball valve

Flanged V type pneumatic ball valve

Flanged pneumatic V-type ball valve is a spherical core channel is designed to

a open “V” shape of the valve, with accurate flow characteristic and control function.

Through 0-90 degrees rotation, to achieve the adjustment of the flow rate and switch

function. No clearance friction between the valve seat and spherical surface, with excellent shear force and self-cleaning ability, especially suitable for fluid medium with fibers or with

small particles.

Technical parameters

Body

Nominal size: DN25-DN250mm

Body material: WCB, 304, 316, 316L

Connection type: Wafer type DN25-200

Flange type DN25-500

Pressure class: PN1.6-4.0MPa

Flange standard: GB, ANSI,DIN,JIS

Structure type: Fixed ball core

Design and manufacturing standards

Design and manufacture: GB/T12237/1989, ASME B16.10 API608

Structure length: GB/T12221, ASME B16.10

Connection size: GB9113.1, ASME B16.5

Pressure testing: GB/T13927-1992, API598, API6D

Valve components

Seat sealing: PTFE:-30℃～180℃

Hard alloy steel: Surface spray welding, tungsten nitride

Core material: 304、316、316(Surface welding hard alloy, chrome, tungsten nitride)

Stem material: 17-4PH

Applicable medium: Water, liquids, oil, solid particles and fiber media

Performance

Adjustable range: 100:1

Rated KV: Refer to the table

Leakage level: metal seal: Less than 0.001%

Soft seal: Less than 0.00001%

Return difference: Less than full stroke 1% (with positioner)

Less than full stroke 3-5% (without positioner)

The basic error: Less than full stroke + 1% (with positoner)

Less than full stroke +5% (Without positioner)

Actuators

Outline size drawing

Type specification table

Pneumatic actuator working principle:

Double acting (POADA):

(Counterclockwise)

Compressed air to Port 2 forces the pistons outwards, causing the output shaft to turn

counterclockwise, while the air is being exhausted from Port 4.

(Clockwise) Air to Port 4 forces the pistons inwards, causing the pinion to turn clockwise

while the air is being exhausted from Port 2.

Single acting (POASR):

(Counterclockwise)

Compressed air to Port 2 forces the pistons outwards, causing the springs to compress,

the pinion counterclockwise while air is being exhausted from Port 4.

(Clockwise)

Loss of air pressure, the stored energy in the springs forces the pistons inwards,

the pinion turns clockwise, while air is being exhausted from Port 4.