Features
■TAMPER-PROOF TEMPERATURE SETTING
■NO FRAGILE EXTERNAL BULBS OR TUBING
■COMPLETELY SELF-CONTAINED有关冬天的诗句
■POSITIVE 3-WAY VALVE ACTION
■HOLDS CLOSE REGULATION
■NOT SENSITIVE TO PRESSURE
■SIMPLE, RUGGED CONSTRUCTION
■OPERATES IN ANY POSITION
■COMPACT SIZE
■LARGE CAPACITY WITH LIGHT WEIGHT
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■EXCELLENT RELIABILITY EVEN UNDER EXTREME SHOCKS AND
VIBRATION
■PRACTICALLY NO MAINTENANCE EVER REQUIRED
How To Order
See back page of this brochure under "Selecting an AMOT Thermostatic Valve."
Also refer to the other brochures on the specific valve ries of interest.
AMOT Thermostatic Valves provide reliable, automatic control of fluid temperatures in turbines, compressors and engine jacket water and lubrication oil cooling systems. They are suitable for process control and industrial applica-tions where fluids must be mixed or diverted depending on their temperatures. They may also be applied to cogenera-tion systems to control temperatures in the heat recovery loop assuring proper engine cooling and maximizing heat recovery.
All AMOT Thermostatic Valves are equipped with positive 3-way valve action in which the water or lubricating oil is positively made to flow in the direction required. On jacket water applications when t
he engine is started up and is cold, the AMOT Thermostatic Valve caus all of the water to be positively by-pasd back into the engine, thus providing the quickest warm-up period possible. After warm up, the correct amount of water is by-pasd and automatically mixed with the cold water returning from the heat ex-changer or other cooling device to produce the desired jacket water outlet temperature. If ever required, the AMOT Thermostatic Valve will shut off positively on the by-pass line for maximum cooling. The 3-way action of the AMOT Thermostatic Valve allows a constant volume of water through the pump and engine at all times with no pump restriction when the engine is cold.
AMOT Thermostatic Valves display excellent reliability even under extreme shocks or vibration and can be quali-fied to MIL-S-901 and MIL-V-19772.
AMOT Thermostatic Valves are available in pipe sizes from 1/2” to 8” for water flow rates of 2-
2800 USGPM. Thermostatic Valves
(Self Actuated Types)
General Information
Form 913
MATERIALS OF CONSTRUCTION
Thermostatic Valve housings in most sizes and ries are available in either cast iron, ductile iron, steel, stainless steel, aluminum or bronze. The cast iron models are recommended for most applications becau of their cost effective performance. Bronze models are often ud on shipboard installations. Steel offers the greatest strength and also the highest pressure ratings. For details on lecting specific valves, refer to the “Selecting an AMOT Thermostatic Valve” ction on the last page and then to the brochure covering the valve ries which best suits your application.
Standard Temperature Element Asmblies are made of brass and bronze. Standard als are Buna N. The materials are suitable for most fluids such as cooling water and petroleum-bad oils. Certain fluids may be damag-ing to standard valve body and al materials. Special materials are available if standard materials are not com-patible with the fluids being ud.
ADJUSTMENTS & MAINTENANCE
No adjustments are ever required on AMOT Thermostatic Valves. Once installed an AMOT Thermos
tatic Valve will provide years of trouble-free rvice. It is entirely lf-contained, and there are no external bulbs or lines to become damaged or broken. There are no packing glands to tighten and no parts to oil. The temperature is perma-nently t at the factory and requires no further adjust-ment. The operating temperature can be changed only by changing temperature element asmblies which is easily accomplished by unbolting the housing. Element asm-blies are all interchangeable within each lettered valve ries.
Typical AMOT Thermostatic Valve installation on a 1200 hp dual fuel engine at the Phillips Pipe Line, Sharpe, Kansas station. Arrow shows the position of a 4" AMOT Thermostatic Valve in the engine water outlet line.
Model 4B Thermostatic Valve
(cutaway view)
Larger valves in the “B” and “H” ries contain multiple element asmblies in one housing. This means that an AMOT temperature element asmbly will fit any size AMOT thermostatic valve housing in that ries.
TEMPERATURE SETTINGS
Becau AMOT Thermostatic Valves are t to a predeter-mined temperature at the factory, costly errors due to mistakes of operating personnel are eliminated. After an AMOT Thermostatic Valve has been installed, it is impos-sible for the operator to arbitrarily change the operating temperature and run the equipment too cold or too hot unless the temperature element asmblies themlves are changed.
The temperature range of AMOT Thermostatic Valves should be lected according to the engine or equipment manufacturer recommendations. This information is usu-ally available from AMOT application engineers who work cloly with original equipment manufacturers. A few general recommendations can be made, however. For marine and stationary engines using heat exchangers,radiators, or some other type of clod water system,jacket water outlet temperatures of 160 to 180 o F are most common. For direct salt water cooled marine engines a 120o F tting should be ud as this temperature is well below the point at which salt will deposit in the water passages of large diel engines. Special salt water element asmblies are available. A thermostatic valve size corresponding to the outlet pipe size on the engine or pump is usually satisfactory. However, if flow information is available, Figure 7 can be ud to lect the proper size.AMOT Thermostatic Valves are temperature rated for the expected nominal operating temperat
ure in jacket water rvice. On lubricating oil applications the system operat-ing temperature may be slightly above the nominal rating,depending on the flow rate, oil cooler capacity and other conditions of the system.
A wide range of temperature ttings is available from 55o F to 240o F (13o C to 116o C)
For long life, AMOT Thermostatic Valves should not be operated continuously at temperatures more than about 25o F (14o C) above their nominal ratings. If higher continu-ous overtemperatures are expected, contact the factory
for recommendations.
OPERATION
The motive force of operation comes from the expansion of a special wax material which remains in a mi-solid form and which is highly nsitive to temperature changes.Fig. 1A shows an element asmbly of the Model B ries with the sliding valve in the cold position. The fluid travels out the by-pass (Port B on the valve) as shown by the arrow.
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Fig. 1B shows the sliding valve moved up to the extended or warm position. The by-pass clos off as the sliding valve ats and the water is diverted to the outlet (Port C on the valve) as shown by the arrow. In actual operation,the sliding valve is normally in about the mid-position.When the wax m
aterial expands with rising temperature,the rubber plug is forced into a reduced diameter in the piston guide, which multiplies the movement of the piston by an extruding action.
The operating range is determined by the chemical com-position of the wax material. The expanding wax develops a pressure that is transmitted directly to the piston, produc-ing a large actuation force, which easily overcomes the return spring force of over 100 lb. Construction is simple and rugged, yet the unit is very nsitive to changes in temperature. Changes in pressure do
中国舞三级not affect the element and due to the valve construction, surges in pressure do not tend to upt the stability of the thermo-static valve.
.
Water Saving Applications Valve shown maintains minimum flow through cooler to conrve water; requires internal leak hole to permit
small flow for nsing.
PIPING DIAGRAMS
The most common piping diagram for jacket water tem-perature control is shown in Fig. 2. Radiator may be substituted for the heat exchanger. The AMOT Thermo-static Valve will operate in any positi
on and mounting should be made in accordance with convenience.For lubricating oil temperature control, the AMOT Thermo-static Valve is ud directly in the lubricating oil line as shown in Fig. 3. The oil by-pass the heat exchanger when cold and will reach the desired operating tempera-ture rapidly. When warm, the correct amount of oil will automatically be circulated through the heat exchanger to maintain the desired temperature. The system shown in Fig. 3A is similar to the standard jacket water temperature control system with the thermostatic valve ud as a diverting valve. In Fig. 3B the AMOT Thermostatic Valve is ud as a mixing valve, in which hot oil enters Port B and cold oil enters Port C. The oil is mixed in proportion so as to emerge from Port A at the desired temperature. AMOT thermostatic valves are ud in many other applications,examples of which are shown in Fig. 4, 5, and 6. Fig. 6shows a basic cogeneration heat recovery system using AMOT thermostatic valves to stabilize temperature and篮球之父
maximize heat recovery.
Cooling water control - Heat Exchanger Valve shown in "diverting"
installation. Mount valve in dotted position for "mixing" applications.
Lube Oil Control Valve shown in diverting position to control oil sump temperature. In dotted position
valve will "mix" hot and cold flow streams
to control supply temperature to engine.
Air Conditioning Valve shown in "mixing" position to control tempera-ture of inlet water to refrigeration system condenr. Valve in dotted
position controls outlet temperature.
Single Pump Cogeneration System Valve # 1 controls the water temperature entering the engine. Valve #2 as shown diverts the flow of excessively hot water to the radiator when the heat exchanger is not removing enough heat from the cooling loop. Valve # 2 in dotted position is an alternative location if mixing instead of diverting rvice is desired.
AMOT Thermostatic Valve Series
Model B
1-1/2" to 2" threaded connections 1-1/2" to 8" flanged connections Flow rates of 68 to 1750 gpm
Cast Iron, ductile iron, bronze, steel, stainless steel
Setting available from 55°F to 240°F
See Form 936
Model C 1/2" to 1-1/2" threaded connections
1-1/2" flanged connections Flow rates of 9 to 54 gpm
Cast iron, bronze, aluminum, steel or stainless steel Settings available from 65°F to 230°F See Form 193
Model D 8" flanged connections only
Flow rates of 1500 to 2800 gpm
Cast iron, ductile iron, bronze, steel housings Settings available from 50°F to 230°F See Form 633
Model E 1-1/4" and 1-1/2" threaded or flanged connections
Flow rates of 40 to 75 gpm
Cast iron, steel or stainless steel housings Settings available from 85°F to 237°F See Form 594
Model H 4", 5" and 6" flanged connections
Flow rates of 345 to 1350 gpm Steel or stainless steel housings Setting available from 55o F to 240o F See Form 898
Model J
1/2" and 3/4" threaded connections Flow rates of 2-20 gpm
蜡笔小新怎么画Aluminum or bronze housings Settings from 65-235°F See Form 972
Mode G Externally actuated (pneumatic or electric)
2" to 16" flanged connections Flow rates of 37 to 8300 gpm
Cast iron, ductile iron, bronze, steel, stainless steel See Forms 1166 and 1242
Form 913 B971
© 2004 Selecting an AMOT Thermostatic Valve
1. Choo appropriate size and model ries bad on the expected flow rate. Using Fig. 7, lect a valve which can handle the desired flow rate. The min. and max. flow rates listed are bad on pressure drop through the valve of approximately 2 psi (min.) and 7 psi (max.)
2. Refer to the brochure covering the valve ries lected.Select from the standard versions offered, choosing the appropriate valve body material.
Cast Iron - for most water and oil systems, best value Ductile Iron - High strength at lower cost than steel Steel - High strength, high pressure rating
Stainless Steel - Highest corrosion resistance, high
strength, high pressure rating Bronze - for salt water and Navy applications Aluminum - for low cost high pressure rvice 3. Select nominal temperature from standard temperature ttings which are available, commonly between 85o F and 190o F. Temperature ttings down to 55o F and up to 240o F are available in some models.4. Select special features if required. Refer to the specific valve ries brochure for availability of special features.Examples include:
•Electroless Nickel plated temperature element asmblies for fluids incompatible with brass or bronze.
•
End Connections. NPT threads are standard on most valves 2-inches and smaller. Alternate thread connections include SAE, metric (BSP-tapered or BSP parallel, JIS), etc. Larger valves are typically flanged. Flange standards available including ANSI,Navy, metric (DIN), JIS, etc.
•
Element Leak Holes allow a small flow through Port C maintaining flow through the cooler at all times.Leak holes prevent condensation or freezing of cooler,and during start-up slow down the warm-up time. In 2-Way applications with Port B blocked and circuit cold, leak holes are necessary to ensure nsing of temperature changes.
•Alternative al materials, such as Viton or
Neoprene (where standard Buna-N is not compatible with working fluid)
•Manual override allows element to be forced open nding full flow through cooler.•Special temperature ttings.
•Special high-overtemperature element asmblies.•
Salt water temperature element asmblies of stainless steel construction (Model B Series only.)
Model Flow Rate Flow Rate Flow Rate Flow Rate No.(US gpm)
(US gpm)(US gpm)(US gpm)Min Max Min Max Min Max Min Max 1/2 CM 9189178178163/4 CM 13251324122312221 CM 14271326132513241-1/4 CM 15301429142813271-1/2 CM 17321631163015291-1/4 CCM
28542752265025481-1/4 E 40703967376536631-1/2 E 45754372426940671-1/2 B
681256512063115611102 B 701306712565120631152-1/2 B
1302301252201202151152103 B 1502701452601402501352404 B 3005402905202805002704804 H 3456203306003205803105505 B 4508004307704207404007205 H 5009204809004608504508226 B 68012006501150630110061011006 H 74513507201300700125067012008 B 90017508701710845162081015008 D
1500
2800
1450
男人骚起来2800
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1400
2600
1350
2500
Note: Minimum Flow Rate is for 2 psi pressure drop through the valve. Maximum flow Rate is for 7 psi pressure drop through the valve.
SAE 10-20SSU 170-500@100o F SAE 30SSU 500-800@100o F SAE 40SSU 800-1000
@100o F Water or Water/Glycol
Fig. 7.
Lubricating Oil
AMOT USA
401 First Street Richmond, CA 94801Tel: +1 510 236-8300Fax: +1 510 234-9950
AMOT SINGAPORE
AMOT
Western Way
Bury St. Edmunds IP33 3SZ
Suffolk England Tel: +44 1284 762222
Fax: +44 1284 760256
10 Eunos Road 8 # 12-06Singapore Post Centre Singapore 408600
Tel: +65 6293 4320
Fax: +65 6293 3307
