Installation, Operation and Maintenance Manual
󲷇H-A003-E-15󲷈 Ball Valve Type 2121α Pneumatic Actuated Type AA 11
Flanged End
(Material: PVC, C-PVC, PP, PVDF)
- Use flat faced flanges for connection to AV Valves.
- Ensure that the mating flanges are of the same standards.
- Be sure to use sealing gaskets (AV Gasket), bolts, nuts, and washers and tighten them to specified torques.
(When a non-AV gasket is used, a different tightening torque specification should be followed.)
Torque wrench Spanner wrench
AV g a s k e t Bolt, Nut, Washer (For many flanges specification)
Procedure
1) Set the AV gasket between the flanges.
2) Insert washers and bolts from the pipe side, insert washers and nuts from the valve side, then
temporarily tighten them by hand.
- The parallelism and axial misalignment of the flange surface should be under the values shown in
the following table to prevent damage the valve.
(A failure to observe them can cause destruction due to stress application to the pipe)
Nom. Size Axial
Misalignment
Parallelism
(a-b)
15-32mm
(1/2”-1 1/4”) 1.0mm (0.04”) 0.5mm (0.02”)
40-50mm
(1 1/2”-3”) 1.0mm (0.04”) 0.8mm (0.03”)
100mm
(4”) 1.0mm (0.04”) 1.0mm (0.04”)
3) Tighten the bolts and nuts gradually with a torque wrench to the specified torque level in a diagonal manner.
(Refer to Fig.1.)
4) Tighten it more than 2 turns clockwise with specified torque. (Refer to Fig.1)
- Do not tighten at the specified torque or more.
(The valve can be damaged or leak.)
Specified torque value Unit󲼗 Nmkgfcm󲽚[lbinch]
Nom. Size 15-20mm
(1/2”-3/4”)
25-40mm
(1”-1 1/2”)
50, 65 mm
(2”, 2 1/2”)
80, 100 mm
(3”, 4”)
PTFEPVDF
coated
17.5
{179}
[155]
20.0
{204}
[177]
22.5
{230}
[200]
30.0
{306}
[266]
Rubber
8.0
{82}
[71]
20.0
{204}
[177]
22.5
{230}
[200]
30.0
{306}
[266]
*Be sure to set the union nut [5] when it was removed or loosen from body [1].
1) The O-ring (A) [8] should be set on surface of the end connector [4b].
2) The end connector [4b] must be put onto the carrier, then ensure that the o-ring (A) [8] is being between the end
connector [4b] and the carrier.
3) Tighten up the union nut [5] hardly with hand.
4) Screw the union nut [5] on the body [1] by quarter or half turn using a strap wrench without damaging it.
Fig.1
Necessary items
Caution
Caution
Axial misalignment)(Parallelism
b
a
Caution
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