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| Cylinders and Pistons |
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| Cylinder |
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Each cylinder separately cast |
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Graded casting used to meet OEM quality |
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Machined & bored to equalising permissible tolerances |
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Perfectly vertically bored and honed |
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Perfectly drilled with proper fixture ensure proper assembly with related parts |
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| Piston |
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Available in steel, cast iron & alloy, fully machined aluminium |
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Perfect dimension, finishing and material construction with specification |
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Diamond polished and packed properly |
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Variety of certified base stock magnaflux tested |
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Dully checked manually individual piston for porocity, dimensional accuracy, Weight and piston ring groove size |
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| Piston Rod |
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Properly heat treated with proper raw materials |
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Ensure proper tensile strength |
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Perfect machine with proper thread matching with cross head and piston nut |
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Ensure surface treatment with grinding with four micro inch RMS surface |
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| Crankshaft |
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| Overhung Crankshaft |
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Our overhung crankshaft designs make possible solid connecting rod. |
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Crankshaft rotates on two heavy duty ball bearings. |
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Overhung crankshaft with replaceable crank pin bush |
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Perfect machining with proper drilling for centrifugal unloaders |
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Dynamic balanced crankshaft rotate freely |
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Axial aligned, perfect machined and hydraulic pressed crankshaft |
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| Crankshaft |
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Ensure fully machined forging crankshaft |
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Dynamic balanced crankshaft rotate freely |
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Axial aligned to minimise vibration of compressor |
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Perfect machining within permissible tolerances to match with main bearing and connecting rod bushing |
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Ensure require oil pressure with "Oil floating bushing" |
| Our long life crankshaft assure minimum wear-trat, labour, parts cost and high compressor efficiency |
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| Bushings |
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| Steel Bushings |
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Proper basic material with CNC machining, proper in-house heat treated and maintained tolerances surface grinding with |
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smooth shining surface |
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Ensure perfect size match with the dimension with crankshaft and connecting rod for easy assembly with long life |
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| Aluminium Bushings |
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Our aluminium main bearing bush (one piece with axial cut) and connecting rod bush (two halves) made from perfect |
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composition with aluminium ingots |
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Proper heat treated and fully machine with perfection equalising OEM size |
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Perfect axial cut to ensure oil pressure in main bearing bush and connecting rod bush |
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Diamond cut finish provide smooth and shining surface |
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Drilled and machined as per OEM quality |
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| Rings and Packings |
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| Piston Ring, Wearing Rings and Rider Rings |
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Individual cast piston ring with complete maching and proper cut |
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Standard and lapped with requirement |
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Metallic, carbon filled teflon, bronze filled teflon, glass filled teflon & TFE Thermon plastics |
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| Valve and Valve Components |
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| Channel Valves |
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Hallmark offers complete range of channel valve design for all reciprocating type compressors. |
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Maximum flow is utilized while perfect sealing is ensured. |
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Exclusive design, perfect machined |
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Precision formed and lapped to have best sealing. |
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Reduce metal fatigue and stress. |
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Standard materials includes graded casting 410, 316 and K-model SS, INconel X-750 |
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Anti corrosive treated to avoid corrosion damage in CI valve parts |
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| Valve Seats and Stop Plates |
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Nodular iron castings are carefully in house heat treated to desired properties for each applications. Insure maximum |
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strength wear and impact resistance. |
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Perfect machining and drilling |
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Interchange as per part number |
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Ensure and perfect assembly with related and reference parts |
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Perfect lift with proper machining to have confirm pressure |
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Machined, drilled, grinded and lapped |
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| Metal valve Guides |
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Highest quality machined steel guide. Precision formed to exacting tolerances that assure proper motion and movements of |
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channel in the valves. |
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Our highest quality guides can significantly improve your compressor valve life. |
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Highest quality sintered/machine alloy |
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Exacting proper tolerances |
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Suitable for lubricated and non lubricated compressor valves |
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| Seat Plates (Flip Plates) |
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316, 410 stainless steel and special order steel are heat treated |
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100% flat with ground and machined lapped |
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Electro polished with micro grinding finishing |
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Demagnetised to perfect movement and proper sealing with channel |
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Ensure prompt pressure and long lasting life of compressor valve |
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| Connecting Rods |
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| Connecting Rods |
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Aluminium, bronze, SG iron & forging connecting rods. |
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Precisely machined at both end. |
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Ensured perfect dimension at Bush & pin holes machining. |
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Great finishing & long lasting. |
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Ensure permissible tolerances. |
| Well match dimension & size in two piece Forging Connecting Rod. |
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