Brochure

BULLETIN 10-10 — Page 1
t THERMOSTATIC EXPANSION VALVES
10
The thermostatic expansion valve (TEV) controls the flow of
liquid refrigerant entering the direct expansion (DX) evaporator
by maintaining a constant superheat of the refrigerant vapor
at the outlet of the evaporator. The TEV controls the difference
between the actual temperature and the saturation temperature
of the refrigerant corresponding to the suction pressure at
the sensing bulb location; this is superheat. By controlling
superheat, the TEV keeps most of the evaporator surface
active, while preventing liquid refrigerant from returning to
the compressor. The ability of the TEV to match refrigerant
flow to the rate at which refrigerant can be vaporized in the
evaporator makes the TEV the ideal expansion device for most
air conditioning and refrigeration applications.
Refer to Bulletin 10-9 for a complete discussion on The Theory of Operation and Application of Thermostatic Expansion Valves.
Refer to Bulletin 10-11 for a complete discussion on Installing and Servicing Thermostatic Expansion Valves.
TABLE OF CONTENTS
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Valve Nomenclature / Ordering Instructions. . . . . . . . . . . 3
Recommended Thermostatic Charges . . . . . . . . . . . . . . . . . 3
TEV Capacity Ratings for Refrigerants:
22, 134a, 401A, 402A, 404A, 407C, 408A, 409A, 410A,
422D, and 507 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Capacity Tables for Refrigerants:
22, 134a, 401A, 402A, 404A, 407C, 408A, 409A, 410A,
422D, and 507 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
TEV Quick Reference Guide . . . . . . . . . . . . . . . . . . . . . . . 9-11
Valve Specifications
RC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
F & EF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-16
Q, EQ, & SQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-21
BQ, EBQ, & SBQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-21
G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
EG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
BF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
SBF & EBF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-26
S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
EBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-30
H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Materials and Details of Construction . . . . . . . . . . . . . . . . 35
OEM Type Thermostatic Expansion Valves . . . . . . . . . . . . 36
Terms of Sale with Warranty Limitations . . . . . . . . . . . . . 37
• SELECTIVE THERMOSTATIC CHARGES
Designed to provide optimum performance for all applica-
tions — air conditioning and heat pump, medium and low
temperature refrigeration.
• THERMOSTATIC ELEMENT DESIGN
Long lasting and field proven stainless steel diaphragm and
welded element construction.
• DIAPHRAGM DESIGN
Large flat diaphragm permits precise valve control.
• REPLACEABLE THERMOSTATIC ELEMENTS
Field replaceable elements on all standard valves.
• ACCESSIBLE INTERNAL PARTS
Durable, leakproof body joint construction allows the valve
to be disassembled, and the internal parts cleaned and
inspected.
• PIN CARRIER DESIGN (CONVENTIONAL VALVES)
Provides precise pin and port alignment, and tighter seating.
• BALANCED PORT DESIGN
Provides perfect pin and port alignment, and prevents
changes in pressure drop across the valve from influencing
valve operation. Provides excellent control on applications
with widely varying operating conditions.
• MATERIALS OF CONSTRUCTION
Pin and port materials offer maximum protection against
corrosion and erosion.
• SILVER SOLDERED CONNECTIONS
For leakproof, high strength connection-to-body joints.
• ADJUSTABLE SUPERHEAT DESIGN
All standard valves are externally adjustable.
Outstanding Features & Benefits of
Sporlan Thermostatic Expansion Valves
FOR USE ON REFRIGERATION and/or AIR CONDITIONING SYSTEMS ONLY
Bulletin 10-10, April 2011 supersedes Bulletin 10-10, October 2009 and all prior publications.