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STRONG PRESSURE REDUCING VALVE                

TYPE "K"— 3/4 INCH

 

The 3/4" Strong Pressure Reducing Valve, Type K is 
designed to operate from a  20 to 100 P.S.I, source of 
steam and reduce this to  5 P.S.I, for delivery to your 
steam cooker. 

With the introduction of a pressure reducing valve to 
your input line, it is recommended that a pressure gauge 
be also installed on the supply side so that the actual 
steam input pressure may be constantly record-ed. The 
selection of a pressure gauge must be made to operate 
within the range of pressure experienced from your 
source of supply. The reduced pressure may con-stantly 
be read on the steam cooker pressure gauge. 

WARNING:  Before final installation connection is made, 

blow down your steam line to remove all 
dirt, scale, packing, and compound which 
may have accumulated within the new 
piping. 

OPERATION OF TYPE K REDUCING VALVES

 

Steam enters inlet port and passes upward through seat 
(12) into discharge side of valve. As pressure in 
discharge side increases, diaphragm (9) is forced 
upward overcoming tension of adjusting spring (4) and 
closing valve. As pressure drops, adjusting spring (4) 
forces diaphragm  (9) down, reopening valve. 

(OBSOLETE)

 

3/4" PRESSURE REDUCING VALVE Parts List 

 

Item 

Description 

Part No 

1 

Adjusting Screw  

104824 

2 

Adjusting Spring Cap  

10-4825 

3 

Spring Washer  

10-4826 

4 

Adjusting Spring, Green 15 Ib   10-4827 

5 

Cover  

104828 

6 

Upper Stem Guide  

104829 

7 

Upper Diaphragm Block  

10-4830 

8 

Cover Gasket  

10-4831 

9 

Diaphragm (with gasket)  

104782 

10 

Body (with seat insert)  

10-4832 

11 

Lower Diaphragm Plate   

10-3833 

12 

Seat Insert  

10-4834 

13 

Strainer Screen  

10-4783 

14 

Disc (pressed on stem)  

10-4835 

15 

Bottom Plug  

10-4836 

 

ADJUSTING TYPE K REDUCING VALVES

 

1. Release the adjusting screw l ock nut and loosen 

adjusting screw (1) enough to release all tension 
on adjusting spring (4). 

2.  Turn steam on slowly. Then turn adjusting screw (1) 

down just enough to allow the valve to open slightly. 
Allow cooker to operate in this manner several 
minutes. 

3. Turn adjusting screw (1) down slowly, at intervals 

until reduced pressure reaches the desired point. 

4. Tighten adjusting screw lock nut. 

INSPECTION - MAINTENANCE - REPAIRS

 

Reports of unsatisfactory regulation of the pressure 
reducing valve is usually due to dirt, pipe compound, 
etc., blocking the internal strainer or gumming up the 
internal mechanism. To clean the strainer, unscrew 
bottom plug (16) and remove strainer screen (13). 
Clean the lower part of the valve. This can be accom -
plished without removing the valve from the line or 
unbolting the cover. If cleaning the strainer does not 
correct fault, remove the valve from the line and dis -
assemble. After thoroughly cleaning, the seat insert 
(12) and disc (14) should be ground together, using a 
very fine abrasive or compound. The seat insert and 
disc are of the ball type and must be "wobbled" when 
lapping. Avoid excessive lapping as this will cause 
ridges to form and make tight seating impos sible. 

5108

 

 

Summary of Contents for A

Page 1: ...Revision 3 1975 MODEL A MODEL A I STEAM COOKERS Manual Automatic PARTS and SERVICE MANUAL Market Forge Everett Ma 01249 Tel 387 4100 Facsimile 617 387 4456 5099 ...

Page 2: ...KER 5104 6 ILLUSTRATION AND PARTS LIST MANUAL A COOKER 5108 7 MODEL A 1 DOOR ASSEMBLY 5106 8 MODEL A DOOR ASSEMBLY 5107 9 WATTS PRESSURE REDUCING VALVE A 1 COOKER 5010 10 STRONG PRESSURE REDUCING VALVE A COOKER 5108 11 STEAM MANIFOLD AND VALVE ASSEMBLY 5109 12 SERVICING THE STEAM SUPPLY VALVE 5110 13 STEAM PRESSURE GAUGE ASSEMBLY 5110 13 CONTROL BOX ASSEMBLY 5111 14 SUGGESTED STEAM CONNECTIONS 511...

Page 3: ...handise shipped If this information is not furnished we will ship the best and most economical way NOTE All part orders received before 2 00 P M are shipped the same day the order is received BASIC OPERATING INSTRUCTIONS FOR AUTOMATIC 1 Check to be sure the steam pressure gauge regis ters between 4 and 5 pounds 2 Place pans of food into the cooking compartment to be used 3 Close and latch the door...

Page 4: ......

Page 5: ...imer 37 90 8144 Comb Steam Exhaust Header 2 comp 90 8145 Comb Steam Exhaust Header 3 comp 90 8146 Comb Steam Exhaust Header 4 comp ITEM PART NO DESCRIPTION 38 90 8534 Pivot Arm 39 10 4742 Safety Valve 3 4 8 Ibs chrome 10 4741 Safety Valve 3 4 8 Ibs brass 40 10 1053 Elbow 3 4 IPS 90 41 10 5164 Junction Box Cover 10 2652 Gasket 42 90 9195 Insulator Buzzer 43 10 6682 Buzzer 44 10 5997 Solenoid 45 90 ...

Page 6: ......

Page 7: ...St St 2 comp 90 9199 Side Panel St St 3 comp 90 9203 Side Panel St St 4 comp 90 9189 Side Panel Enamel 2 comp 90 9200 Side Panel Enamel 3 comp 30 10 6156 Steam Trap 31 10 6157 Adapter Sub Ass y 32 90 8963 Copper Tubing 3 16 O D x 18 10 4370 Brass Nut ITEM PART NO DESCRIPTION 10 4371 Brass Sleeve Female 33 10 3761 Nipple 3 4 IPS 7 1 4 Ig 34 10 1053 Elbow 3 4 IPS 90 35 10 4741 Safety Valve 3 4 8 Ibs...

Page 8: ...MASTER ILLUSTRATION Manifold Compartment Automatically Operated ...

Page 9: ... 60 minute electric timer 30 10 5499 115V Pilot Light 31 10 4713 Timer knob 32 10 4748 0 30 Pressure Gauge 90 8683 Bezel 2A 33 90 8684 Bezel 3A 34 10 2339 10 Hex nut St St Item Part No Description 90 8549 Manifold Shield St St 35 90 8541 Manifold Shield Painted 90 8434 Side Panel St St 2 comp 90 8435 Side Panel St St 3 comp 90 8436 Side Panel St St 4 comp 90 8430 Side Panel Painted 2 comp 90 8431 ...

Page 10: ...MASTER ILLUSTRATION Manifold Compartment Manually Operated ...

Page 11: ...1 4 St St Self Tapping Screw 20 10 5220 0 60 Minute Mechanical Timer 21 10 4713 Timer Knob 22 10 4748 0 30 Pressure Gauge 23 90 8683 Bezel 2A 90 8684 Bezel 3A 24 10 2339 10 Hex Nut St St Item Part No Description 25 90 8549 Manifold Shield St St 90 8541 Manifold Shield Painted 90 8434 Side Panel St St 2 Comp 90 8435 Side Panel St St 3 Comp 90 8436 Side Panel St St 4 Comp 90 8430 Side Panel Painted ...

Page 12: ...10 2427 1 16 Thk x 1 O D Flat Washer 12 90 8111 Hinge Polished upper and lower 90 8316 Hinge Enameled upper and lower 90 8147 Inner Door Ass y Items 1 5 ITEM PART NO DESCRIPTION 13 10 1981 Pivot Hinge 14 90 8113 Handwheel Polished Solid 90 8328 Handwheel Spoked Enamel 15 90 8126 Outer Door Ass y Polished 90 8320 Outer Door Ass y Enameled 16 10 2423 Thrust Washer 17 10 3080 Door Bushing 18 10 1696 ...

Page 13: ...2 10 4121 Retaining Ring 13 90 8879 Door Hinge Pin 90 8677 Outer Hinge Bracket Polished 14 10 0474 Outer Hinge Bracket Painted 90 8520 Inner Hinge Bracket Bottom Polished 15 10 0426 Inner Hinge Bracket Bottom Painted 16 90 8559 Handwheel stainless steel 90 8560 Handwheel painted 17 90 8680 Outer Shell Assembly painted 90 8507 Outer Shell Assembly St St 18 10 1690 Roll Pin 19 10 2423 Thrust Washer ...

Page 14: ...se just enough to allow the valve to open slightly Allow cooker to operate in this manor several minutes 3 Turn adjusting screw down slowly at intervals until reduced pressure reaches the desired Point 5 P S I 4 Tighten adjusting screw lock nut 5 If chattering noise should occur turn adjusting screw located in bottom half of valve body clockwise or counter clockwise until chattering stops INSPECTI...

Page 15: ...r 104828 6 Upper Stem Guide 104829 7 Upper Diaphragm Block 10 4830 8 Cover Gasket 10 4831 9 Diaphragm with gasket 104782 10 Body with seat insert 10 4832 11 Lower Diaphragm Plate 10 3833 12 Seat Insert 10 4834 13 Strainer Screen 10 4783 14 Disc pressed on stem 10 4835 15 Bottom Plug 10 4836 ADJUSTING TYPE K REDUCING VALVES 1 Release the adjusting screw lock nut and loosen adjusting screw 1 enough ...

Page 16: ...he hole facing the front portal 2 Drop valve synchronizer lever and ball assembly 5 in from the top opening of the valve with cut out on the lever facing ball 4 3 Manipulate valve synchronizer 3 in position large prong in ball smaller prong in lever 4 Screw on valve bonnet 1 and valve cap 6 5 Place the spacer over the shaft of the valve synchronizer 6 Place the valve actuating arm over the shaft o...

Page 17: ...mend an application of Rectorseal to threads to make a secure fit 5 Repeat the above process if the first attempt does not stop the valve from leaking Seating tool may be obtained from the factory THE STEAM PRESSURE GAUGE ASSEMBLY To remove the complete steam pressure gauge assembly it will first be necessary to remove the side panel The steam pressure gauge may then be detached by removing item 2...

Page 18: ...signifying that cooking is taking place the buzzer and solenoid will still be de energized When the cycle on the timer clock has been completed a flow of current will energize the solenoid forcing the solenoid push rod to lift and disengage the operating handle The operating handle now freed from the bumper and stop bar will spring back to the off position The innermost micro switch released from ...

Page 19: ...lobe valve for emergency shut off a ball float trap to prevent dirt and water from entering the cooking units and a pressure regulating valve to reduce and regulate steam pressures for delivery NOTES 5112 ITEM PART NO DESCRIPTION 1 10 2821 3 4 Globe Valve 2 10 5336 Ball Float Trap 3 10 1033 3 4 Pressure Reducing Valve 5 Ib enamel 10 1034 3 4 Pressure Reducing Valve 5 Ib chrome ...

Page 20: ... similar except for no req d of Timers Switches Solenoids Lights Connectors 2 On 3 4 compartment wiring use Marr Conn 10 5172 when connecting more than 3 wires DIAGRAM NOTES 1 Dw g No B 90 9217 or B 90 8727 Guide Bracket Micro Switch Ass y made up as a sub ass y with leads 90 8915 90 8916 90 8917 90 8918 2 Use B 90 9217 on A 1 Cooker Use B 90 8727 on A Cooker 5113 ...

Page 21: ...omatic 2 3 4 Compartment 120 V 60 Hz 240 V 50 Hz Drawinq No B 90 9240 SCHEMATIC NOTE End of Cooking Cycle Timer at zero Control Arm in unlocked position Light Solenoid Buzzer de energized Buzzer silenced by reset button on switch 5114 ...

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