Expansion Valves0 pages

EXPANSION VALVES
The function of an Expansion Valve is to meter liquid refrigerant
and induce a large pressure drop causing the refrigerant to cool
rapidly.
Applications
Expansion Valves are used immediately prior to the evaporator in a
refrigeration or air conditioning system. These valves are suitable for use
with ammonia, HCFC and HFC refrigerants and their associated oils, as well
as other industrial fluids non-corrosive to steel and ductile iron.

Main Features
Ÿ
Backseating stem to allow for replacing stem packing while under

pressure

Ÿ
Four bolt bonnet flange design
Ÿ
Internal replacement parts available
Ÿ
NPT connections

Technical Specifications
Maximum working pressure = 400 PSI (27.6 Bar)
Allowable operating temperature = -20°F to +275°F (-29°C to +135°C)

Materials of Construction
The body and bonnet are made from ductile iron. The stem is made from
stainless steel. The seat insert is made from cold rolled steel. The bonnet
gasket is made from Garlock 2930.

Open

*Cv Value
1/4

1/2

3/4

1

2

3

Full
Open

320F-E

0.09

0.22

0.40

0.56

1.00

1.28

1.58

330F-E

0.20

0.42

0.71

0.95

1.50

2.09

2.60

340F-E
0.34 0.81 1.21 1.62
*Water GPM at 1 psi pressure drop at +86°F

2.89

3.80

4.51

Stem Turns
From Closed

C

Valve P/N

Part No

1/2
3/4
1

FLOW CONTROLS

320F-E
330F-E
340F-E

NPT Conn
(inch)

12

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B
Orifice
Dia.
A

Dimensions (inch)
A
3.63
3.63
4.13

B
0.94
0.94
1.10

C
6.17
6.17
6.30

Orifice Diameter
(inch)

Weight (lbs.)

0.25
0.38
0.50

2.5
2.5
3.5