INTRODUCTION
The Hansen PXV and PXVW are pulse modulating liquid
refrigerant expansion valves. The PXV uses a specially
designed, high-cycle, long life, solenoid operator. A
sophisticated 4-20 mA input signal is used to monitor
the liquid flow to the system. Unlike traditional TXVs,
the pulse design eliminates the need to maintain
minimum pressure differential. Low and varying liquid
feed pressures (head pressure) are compensated by
the basic variable valve operation. It is suitable for use
with ammonia and most common refrigerants.
The unique PXVW60 body has an integral 100 mesh
(150 micron) strainer screen and features direct weld
assembly, eliminating flange gasket leak potential. In
addition, the PXVW valve has an adjustable, integral
hand-expansion plug to regulate the flow from 15 to
60 nominal tons of ammonia. Consult the factory for
PXVW halocarbon capacities.
APPLICATIONS
The PXV modulates the flow of liquid feed to an evaporator
or chiller. It is recommended for use wherever a thermal
expansion valve (TXV) would be used. It is also ideal for
liquid make-up to small surge vessels above flooded
heat exchangers to minimize fluctuations in liquid level
and evaporator pressures, and for liquid injection for
compressor oil cooling.
key FeATUReS
• PXV5, PXV15 drop-in replacement valve for
Sporlan DA series thermostatic expansion valve
• PXV does not require minimum pressure drop to
operate; low head pressure tolerant
• PXVW60 with adjustable capacity settings from
15 to 60 nominal tons of ammonia
• Simple, compact controller programmed for liquid
level control, liquid injection oil cooling, or DX
superheat control
• Operates with 115V, 220V, or 24V AC coil
FLANGED CONNECTION
DROP-IN FOR SPORLAN
DA SERIES TXV
STEM TO
ADJUST CAPACITY
OF VALVE
1/2" TO 3/4"
WELD-IN-LINE
CONNECTION
PXV
PXVW
SPeCIFICATIONS
Body:
PXV: Ductile iron, ASTM A536 (Flanged Valve)
PXVW: Cast Steel, ASTM A352, grade LCB
Seat Disc: Teflon
Valve Seat: 303 Stainless Steel
Safe Working Pressure:
400 psig (28 bar)
600 psig (40 bar) available upon request
MOPD: 285 psi (19.7 bar)
Refrigerant Temperature: –60°F to +240°F (–50° to 115°C)
Refrigerants: ammonia, R22, R404, R507, R134a,
CO2, and other Hansen approved refrigerants
Specifications, Applications,
Service Instructions & Parts
PulSe wIdth control
exPAnSIon vAlve
(Pxv & Pxvw)
Bulletin P249
oct 2013
Pulse width Modulated liquid
level control, dx evaporator and
liquid Injection for refrigerants
PXVW
PXV