INOXPA PHARMAVALVE, Installation, Service & Maintenance Manual

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10 ED. 2009/09 /
3.9.2. PHARMAVALVE - Tank Bottom.
The tank-bottom body is usually placed as shown in the figure below.
The distance of the body weld to another weld must be at least 3 times the tank thickness.
• In order to weld the casing on the tank, a hole with the following diameter must be made:
And the following conditions must be taken into account:
• Polish the edges of the hole being prepared for welding.
• Ensure that the body outlet is correctly oriented.
• Place the weld points on the exterior of the casing (TIG welding). The filler material is determined according to the
material of the body and tank.
• Seal and fill the space between the tank base and the main base with inert gas.
• Starting from the outside, weld the body in a single operation. Make sure that the material has melted and penetrated
correctly, and is free of pores and cracks. Use as little heat as possible (low intensity). High intensity may deform the
valve.
• Continue welding until the body is completely welded.
• Leave to cool gradually. Cool by air only
• Turn over the tank base and weld from the inside.
• Leave to cool gradually. Cool by air only.
• Polish the inside and outside until the required surface finish has been achieved.
3.10. AIR CONNECTION TO ACTUATOR
• Connect and check the air connections as needed: Double or Single acting
• INOXPA valves are supplied with Ø4 tube connections and a silencer in S/A actuators.
• Bear in mind the quality of the compressed air in accordance with the specifications described in chapter 8
Technical
Specifications .
The compressed air pressure for the actuators A/A (double acting) is less than in type NC (normally
closed)). See chapter 8
Technical specifications .
Excessive pressure can seriously damage the diaphragm.
The pneumatic actuator is available in two versions:
• N-C: Spring closed, Air open
• A-A: Air closed, Air open
Valve size Diameter D
DN ½” 50mm
DN 1” 79mm
DN 1 ½” 100mm
M5 Thread
pneumatic
connections for all
sizes.
10.
32
0.3
2.
00
05
10.
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0.3
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04