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The MASTERGEAR 9800 SERIES, a milestone in the development of manual operated gearboxes for quarter-turn valves.

Aluminum construction and rugged design of the Mastergear 9800 series range of manual
valve actuators guarantees it has been engineered to meet the arduous requirements demanded of industrial environments. Through corrosion resistant treatment of the input shaft and the use of lip seals with multiple sealing surfaces, the 9800 range is sealed to IP67 and achieves exceptional durability. All models use high performance axial needle roller bearings, which combined with a one-piece input wormshaft, maximizes the available mechanical advantage and overall unit efficiency.

Features & General Specification:
ItemComponent Material Description Material Specification
1 upper Aluminum 380 Alloy
2 lower Aluminum 380 Alloy
3 Worm shaft Bearing Sintered Iron-Copper FCO200-18
4 Oil Seal Injection Molded Plastic Hytrel 4556
5 Wormshaft Nitempered Steel ALSI 4110 hardened
6 Bearing Thrust Washer Needle Thrust Washer Type AS
7 Thrust Bearing Needle Thrust Bearing TYPE AXK
8 Quadrant Sintered Copper Steel FCO205-50
9 Lower „o“ ring Molded Rubber Nitrille
10 Drive Bushing Sintered Copper Steel FCO205-40
11 Flange Nut Flange Hex Nut High tensile steel
12 Stop Screw Socket Set Screw High tensile steel
13 Stop Screw Plug Molded Rubber Nitrille
14 Fixing Screw Torx Head, Taptite Hardened Alloy Steel
15 Indicator Cap Injection Molded Plastic Low Density Polyethylene
16 Indicator Flag Injection Molded Plastic Low Density Polyethylene
17 Upper „o“ ring Molded Rubber Nitrille
18 Nameplate Self-Adhesive Aluminum Grey on Bright Backgroud

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Typ převodovky980198049807
Max. Output Torque for 5.000 cycles 226 500 1000
Max. Output Torque for 2.500 cycles 271 600 1200
Max. Input Torque 5000 cycles 2145 88,5
Max. Input Torque 2.500 cycles 25 55 106,2
Mechanical Advantage11 11 11,3
Ratio40:1 40:1 42:1
Turns To Close10 1010,5
Valve Mounting Flange F05, F07, F10 F07, F10, F12 F10, F12, F14
Drive bush type DB1 DB4 DB7
A Max Valve Stem Diameter (mm) 24,930,545
B Max Valve Stem Height (mm)54,859,670,7
 C119,7147,9188,7
 D56,265,181,8
 E38,55266,7
 F176,3200,2249,8
 G120,0135,1168,0
 H112,6130,2163,5
 J20,025,032,0
 K12,015,020,0
 L71,072,587
 M30,432,037,7
 N50,551,466,3
 P54,669,794,7
 R85,8111,8148,9
 T19,121,825,4
B Max Valve Stem Height (mm)1,52.35.0
Recommended Handwheel for 5.000 cyclesSR5SR8SR10
Recommended Handwheel for 2.500 cyclesSR18SR10SR12

Valve coupling dimensions (mm), machining and weight:

Unit øa max.øa min.øb max.h max.def max..gøcUnit weight
DB1 28,6 9,5 25,0 60,9 35,1 19,4 M12 11,0 38,00,23 kg
DB4 35,0 12,7 32,0 57,0 35,1 19,4 M12 12,0 47,50,35 kg
DB7 50,0 15,9 45,5 64,0 47,7 21,6 M16 14,0 66,60,95 kg