Brochure

Balanced Port
TYPE
Conventional
Port
TYPE
t TYPE Q & BQ
BULLETIN 10-10 — Page 17
For Refrigerants 22, 134a, 404A, 410A*, 507
SAE Flare & Extended ODF Solder Connections
The Sporlan Q & BQ series are replaceable car-
tridge style valves designed for small refrigera-
tion systems, such as refrigerated cases, coolers,
and freezers. The externally equalized versions
of these valves are ideal for air conditioning
and heat pump systems. BQ valves are balanced
ported, engineered specically for systems with
a wide range of operating conditions and may be
applied on bi-directional applications.
Q & BQ valves are supplied as three individual
component parts: the thermostatic element, the
valve body, and the replaceable cartridge or ori-
ce. The interchangeable nature of the Q & BQ
family make it ideal for reducing inventory, while
increasing valve options — so, the right valve is
always on hand.
BODY FEATURES
Q & BQ brass body type valves feature Sporlan’s
traditional knife edge, metal-to-metal thermo-
static element to valve body construction, which
ensures a leak-proof joint.
SELECTIVE CHARGES
Sporlan selective thermostatic charges are spe-
cically designed for low temperature, medium
temperature, and air conditioning applications.
The elements are manufactured with a large at
diaphragm to reduce diaphragm stresses and pro-
vide precise control. And, because Q & BQ valve
bodies and thermostatic elements are supplied as
independent components, the installer is able to
select the best possible thermostatic charge for
the application.
INTERNAL PORT DESIGN
Refrigerant ow through the valve port opposes
the pin movement in all type Q and BQ valves.
This provides improved stability at light loads,
when the pin modulates to a position close to the
port. Additionally, charge migration, is reduced
or eliminated by the Q & BQ valve design. By
engineering the liquid ow to enter through
the top of the valve body, the liquid refrigerant
warms the thermostatic element and minimizes
the potential for charge migration.
For complete details of construction, see page 35.
Flare Connections Extended Solder Connections Extended Solder Connections with
Forged Inlet and Replaceable Strainer
SBQE
ODF
(Externally
Equalized)
SBQ
ODF
(Internally
Equalized)
SELECTING COMPONENTS
BODY
EQ
ODF
(Internally
Equalized)
EQE
ODF
(Externally
Equalized)
Q
SAE
(Internally
Equalized)
QE
SAE
(Externally
Equalized)
SQE
ODF
(Externally
Equalized)
SQ
ODF
(Internally
Equalized)
BQE
SAE
(Externally
Equalized)
BQ
SAE
(Internally
Equalized)
EBQE
ODF
(Externally
Equalized)
EBQ
ODF
(Internally
Equalized)
*Type Q, EQ, and SQ are not approved for R-410A applications.