Flowserve HV 215 - Manual (Page 21)

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Bottom valve HWV 215/1 - DN 80
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Installation
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Attention
Make sure that welding and, if necessary, annealing work does not damage the seals and gaskets!
Check and, if necessary, clean sealing surfaces.
Always replace gasket when removing the actuating cylinder.
The specified torques must be strictly observed.
After the valve head install the body with the actuating cylinder.
The assembly parts of the valve body comprise:
n
 Gasket ∅ 25
n 6 Hexagon head cap screws M6 x 40
n  Gasket (spare part for replacement)
The body is supplied together with the actuating cylinder as a complete component part.
See drawings on page 4 and page 23
. First weld the manifold to the body, taking the specifications of the local welding authority into account. The body
end is sized for a pipe having an outside diameter of 88.9 mm. To weld the manifold it might be necessary to
remove the actuating cylinder B from the body. For this purpose unscrew the hexagon head cap screws $ and
carefully push the actuating cylinder B downwards. Remove the gasket !. Do not re-use this gasket! Insert the
supplied spare gasket !.
2. Check the torque (50 Nm) required for tightening the hexagon head cap screws $. If the actuating cylinder B
has been removed, tighten the hexagon head cap screws $ with a torque of 50 Nm. Apply a commerically
available lubricant to the screws and tighten them in several steps in diagonally opposite pairs.
3. Then check the lift of the push rod 9 in the body with actuating cylinder B. For this purpose measure the
reference dimension 2 and 3 (see page 23) from the upper edge of the push rod 9 to the sealing surface of the
unloaded bellows 0 and to the lower stop of the bellows 0. If the distance exceeds the admissible tolerance,
check the push rod 9 for smooth operation. If the push rod is jammed, first eliminate the cause and then gently
knock with your hand against the push rod 9 until it can move freely. If you cannot find a fault please contact our
Technical Services in your country, stating the GESTRA manufacturing number.
4. Insert the supplied gasket 8 in the bottom of the valve head and use the hexagon head cap screws b to screw
the body to the mounting flange, applying a torque of 20 Nm. Apply a commerically available lubricant to the
screws and tighten them in several steps in diagonally opposite pairs.
5. Engage the loop of the tension spring of the control unit X to the hexagon head cap screw b.
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