TABLE OF CONTENTS
Page 2/ BULLETIN 10-10
SPORLAN THERMOSTATIC EXPANSION VALVES
10
香煎虾饼Outstanding Features
最温暖的陪伴作文600字&Benefits of Sporlan Thermostatic Expansion Valves
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 tempera-ture of the refrigerant corresponding to the suction pressure at the nsing bulb location; this is superheat. By controlling
superheat, the TEV keeps nearly the entire evaporator surface active, while preventing liquid refrigerant from returning to the compressor. The ability of the TEV to match refrigerant flow to the ra
te at which refrigerant can be vaporized in the evaporator makes the TEV the ideal expansion device for most air condi-tioning and refrigeration applications.
•SELECTIVE THERMOSTATIC CHARGES Designed to provide optimum performance for all
applications — 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 preci valve control.
•REPLACEABLE THERMOSTATIC ELEMENTS Field replaceable elements on all standard valves.• 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.
• PIN CARRIER DESIGN (CONVENTIONAL VALVES)Provides preci pin and port alignment,
and tighter ating.
• ACCESSIBLE INTERNAL PARTS Durable, leakproof body joint construction allows the valve to
be disasmbled, and the internal parts cleaned and inspected.
• 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 except the
Type NI, which is internally adjustable through its outlet connection.
THERMOSTATIC EXPANSION VALVES
FOR USE ON REFRIGERATION and/or AIR CONDITIONING SYSTEMS ONLY
Bulletin 10-10, January 1998 superdes Bulletin 10-10, December 1995; Bulletin 10-15, February 1994 and all prior publications.
©COPYRIGHT 1998 BY SPORLAN VALVE COMPANY , WASHINGTON, MISSOURI
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.
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . .3
Valve Nomenclature / Ordering Instructions . .4Recommended Thermostatic Charges . . . . . . . . .4TEV Capacity Ratings for Refrigerants:
12, 22, 134a, 401A, 402A, 404A, 407A, 407C, 408A,409A, 502, 507, and 717 . . . . . . . . . . . . . . . . . . . .4Capacity Tables for Refrigerants:
12, 22, 134a, 401A, 402A, 404A, 407A, 407C, 408A,409A, 502, 507, and 717 . . . . . . . . . . . . . . . . . .5-9TEV Quick Reference Guide . . . . . . . . . . . . . .9-11Valve Specifications
NI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12RIVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13F & EF . .
. . . . . . . . . . . . . . . . . . . . . . . .14-15Q, EQ, & SQ . . . . . . . . . . . . . . . . . . . . . .16-19G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
EG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22BF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23SBF & EBF . . . . . . . . . . . . . . . . . . . . . . .24-25S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26EBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28-29H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35Materials and Details of Construction . . . . . . . . .36OEM Type Thermostatic Expansion Valves . . . . .37Pressure-Temperature Chart . . . . . . . . . . . . .38-39
The following procedure should be ud when lecting a Sporlan TEV:
1.Determine the liquid temperature of the refrigerant entering the valve —The TEV capacity tables on pages 5 to 9 are bad on a liquid temperature of 100°F for R-12, R-22, R-134a, R401A, R-402A, R-404A, R-407A, R-407C, R-408A, R-409A, R-502, R-507; R-717 (ammonia) capacities are bad on 86°F. For other liquid temperatures, apply the correction factor given in the tables for each refrigerant. For example e Table B.
2.Determine pressure drop across valve — The pressure drop correction factors are bad on standard liquid tempera-ture and pressure drop. The standard pressure drop is depen-dent on the evaporator temperature. To determine the pressure drop, subtract the saturated pressure equivalent to evaporator outlet temperature from the condensing pressure. The con-densing pressure ud in this calculation should be the mini-mum operating condensing pressure of the system. From this value, subtract all other pressure loss to obtain the net pres-sure drop across the valve. U this value to determine the pressure drop correction factor. For example e Table C. Be sure to consider all of the following possible sources of pressure drop:
1.Friction loss through refrigeration lines including
the evaporator and condenr.
2.Pressure drop across liquid line accessories such as a
solenoid valve and filter-drier.
3. Static pressure loss (gain) due to the vertical lift (drop)
of the liquid line.
4. Pressure drop across a refrigerant distributor if ud. Refer to Bulletin 20-10 for information on refrigerant distributors.
3.Select valve from the capacity tables —Select a valve bad on the design evaporating temperature. If possible the valve capacity should be equal or slightly exceed the design rating of the system. Be sure to apply the appropriate correc-tion factors for liquid temperature and pressure drop. Once the desired valve capacity has been located, determine the nomi-nal capacity of the valve from the tables’cond column. On multiple evaporator systems, lect each valve on the basis of individual evaporator capacity. For example e Table A.
月季花的扦插4.Determine if an external equalizer is required — The amount of pressure drop between the valve outlet and bulb location will determine if an external equalizer is required. Refer to Bulletin 10-9 for further information on this subject.
茄子干的做法5.Select body type — Select the body type according to the style connections desired. For complete specifications on each TEV type including nominal ratings, refer to pages 9 to 11.
6.Select the Sporlan Selective Thermostatic Charge —Select the charge according to the design evaporating temper-ature from the Table on Page 4. Refer to Bulletin 10-9 for a complete discussion
真心话的问题of the available Sporlan Selective Thermostatic Charges.
Selection Example – Refrigerant 22
Application: medium temperature refrigeration
Design evaporator temperature . . . . . . . . . . . .20°F
Design condenr temperature . . . . . . . . . . . .95°F
Refrigerant liquid temperature . . . . . . . . . . . . .70°F
Design system capacity . . . . . . . . . . . . . . . . . . 1 ton
Available pressure drop across TEV:宝岛姑娘打一字
Condensing pressure (psig) . . . . . . . . . .182
Evaporating pressure (psig) . . . . . . . . . . .43
139
Liquid line and accessories loss (psi) . . . .– 4
Distributor and tubes loss (psi)Q . . . . .– 35
100 Refrigerant liquid correction factor . . . . . . . . . . 1.17
Pressure drop correction factor . . . . . . . . . . . . .0.89
U the following formula to calculate TEV capacity:
TEV Capacity = TEV rating x CF liquid temperature x CF pres-sure drop
EGVE-1 Has valve capacity of: 1.09 x 1.17 x 0.89 = 1.13 Tons at 20°F evaporating temperature, 100 psi pressure drop and 70°liquid temperature.
Thermostatic charge (from Table on Page 4): VC W Selection:
EGVE-1-C 3/8”x 1/2”x 1/4”ODF x 5’
Q An externally equalized valve must be ud on evaporators employing a refrigerant distributor due to the pressure drop created by the distributor. In addition, an externally equal-ized valve should
always be ud with air conditioning thermostatic charges to reduce the possibility of thermo-static charge migration.
W Plea note that the refrigerant charge designation in the thermostatic charge (“V” in this ca) is dropped when it is incorporated into the valve model designation.
BULLETIN 10-10 / Page 3
SELECTION PROCEDURE
Page 4/ BULLETIN 10-10
SPORLAN SELECTIVE CHARGES ENGINEERED for PEAK PERFORMANCE for EACH SPECIFIC APPLICATION
7.Valve Nomenclature / Ordering Instructions —Combine the letters and numbers in the following manner to obtain the complete valve designation. Also include all connection sizes and the capillary tube length.
* APPLICATION FACTORS:
1.The Type ZP charges have esntially the same characteristics as the Type Z charge with one exception:they produce a pressure limit Maximum Operating Pressure (MOP).ZP charges are not intended as replacements for Z charges.Each should be lected for its own unique purpo.Refer to Bulletin 10-9 for additional application discussion.
2.All air conditioning and heat pump charges are intended for u with externally equalized valves.Refer to Bulletin 10-9 for complete discussion on when to u an external equalizer.
3.Type L Liquid charges are also available for most commonly ud refrigerants in most element sizes.
4.Refer to Bulletin 10-9 for information regarding the differences between the VGA and VCP100 charges.
5.If in doubt as to which charge to u, review the ction on thermostatic charges in Bulletin 10-9 or contact Sporlan Valve Company, Washington, Missouri with complete system data.
TEV capacity ratings for R-12, R-22, R-134a, R-401A,R-402A, R-404A, R-407A, R-407C, R-408A, R-409A, R-502,R-507 are bad on vapor free 100°F liquid refrigerant enter-ing the expansion valve, a maximum opening superheat of 7°F,and a standard factory air test superheat tting. A discussion of the relationship between valve capacities and superheat t-tings can be found in Bulletin 10-9.
The ratings for evaporator temperatures 40°F, 20°F, -10°F,-40°F in the capacity tables are in accorda
nce with ANSI/ARI Standard Number 750. TEVs are tested in accordance with ANSI/ASHRAE 17.
TEV models featuring the mechanical pressure limit style ther-mostatic elements, i.e., the Types G(PL) and C(PL) TEVs, are now obsolete. Consult Bulletin 210-10-17 for additional informa-tion on this subject and replacement valves.
R-717 (ammonia) capacities for Types D and A TEVs are shown on Page 9. The ratings are bad on vapor free 86°F liquid refrigerant entering the TEV , a maximum opening superheat of 7°F, and a standard factory air test tting.
For TEV capacity ratings at operating conditions not shown in the following tables, contact Sporlan Valve Company.
TEV CAPACITY RATINGS FOR REFRIGERANTS:
12,22,134a,401A,402A,404A,407A,407C,408A,409A,502,507,717
BULLETIN 10-10 / Page 5
思维的意思
The factors include corrections for liquid
售后服务维修
refrigerant density and net refrigerating effect
and are bad on an evaporator temperature of
0°F. However, they may be ud for any evapo-
rator temperature from 0°F to 40°F since the
variation in the actual factors across this range
is insignificant.
TEV capacity = TEV rating x CF liquid temperature x CF pressure drop —Example: Actual capacity of a nominal 1-1/2 ton R-134a Type EG valve at 20°F evaporator, 100 psi pressure drop across the TEV, and 60°F liquid temperature entering the TEV = 1.91 (from rating chart) x 1.29 (CF liquid temperature) x 1.12 (CF pressure drop) = 2.76 tons.
