Ball Valve Installation And Operation - McQuay MDS 30 Installation Manual


The proper steps to insulate the refrigerant piping are shown below.
Thickness
Heat resistance

6.5 Ball valve installation and operation


Operate the gas side ball valve
o
Uninstall the flange connector: remove the flange connector from the piping
o
Stick the seal material to cover the inlet of the ball valve flange to avoid the dirt entry
o
Change the hollow seal pad
o
Fix the flange connector and hollow seal pad and fixed ball valve of gas side with screw bolt.

Liquid side ball valve connecting: expand the copper tube outlet and connect the ball valve connector

Vacuum and charge in refrigerant, ensure to open the valve completely

Calculate the additional refrigerant and charge into units accordingly

Check the looseness to avoid leakage of refrigerant
E
A
o s
B
C
D
ball valve
(gas side)
J

Copper tube expanded connector dimension.
External Diameter
mm
Ф6.35
Ф9.52
Ф12.7
Ф15.88
Ф19.05
Installation Manual IM-MDS_(i)
Diameter 6.35 - 25.4mm
Min 10mm
E
F
o s
G
A Valve stem
B Stopper pin
C Packing(accessory)
D Connecting pipe(accessory)
E Open
I
H
F Cap, copper packing
G Service port
ball valve
H Flare nut
(liquid side)
I Liquid pipe diameter
J Gas pipe diameter
K
K Field piping
Diameter
inch
1/4"
9.0
3/8"
13.0
1/2"
16.2
5/8"
19.4
3/4"
23.3
Pipe Specification
Diameter 28.58 - 41.3mm
Min100℃
o
(unit: mm)
Min 12mm
s
Close-packed
packing
Hollow
packing
19