Murphy LR857 User's Manual
Contents
1. below Oil with 0 9 specific gravity 70 F 21 C 9 73 psi 25 5 d 520 tg 2 T 15 8 8 8 10 g z 05 l Flow opsi 0 USGPM 0 0 2500 0 5000 Thumb Valve Operation As the equipment uses oil the float falls provid ing immediate level compensation At FULL position the float holds the valve closed If the clean oil supply is depleted and oil level contin ues to fall the low level switch will operate an alarm or equipment shutdown Eliminates Under OverFill Due to Human Error m Simple Installation m Automatically Maintains Lube Level m Low Level Switch m Models to Fit Varied Applications m Positive Sealing Thumb Valve Simplified Drawing of Thumb Valve Operation Thumb Valve LR8570 Case LOW l COM 0 _ _ Low Level N ee Switch Fittings Kit 15000420 The 15000420 kit is sold separately It includes the following items Quantity Description 1 1 4 in 6 mm O D copper cane tube vent connection 1 1 4 in 6 mm tube x 1 4 male pipe fitting 1 1 2 in 13 mm I D hose fitting outlet connection Warranty A limited warranty on materials and workmanship is given with this FW Murphy product A copy of the warranty may be viewed or printed by going to www fwmurphy com support warranty htm Products covered by this bulletin comply with EMC Council directive 89 336 EEC regarding electromagnetic compat2. part number Inlet Valve Assembly 15000159 Glass and Switch Ass y 15000100 Lid Assembly 15000161 Float Assembly Brass std 15000941 LR857 Shipping Dimensions 9 x 5 1 2 x 6 in 229 x 140 x 152 mm LR857 Shipping Weight 3 lbs 6 oz 1 5 kg MURPHY gt FW Murphy P O Box 470248 Tulsa Oklahoma 74147 USA 1 918 317 4100 fax 1 918 317 4266 e mail sales fwmurphy com www fwmurphy com LR857 Typical Installation For vented crankcase use the cane vent For sealed systems vent must be piped back to crankcase above oil level Electrical Conduit CONTROL SYSTEMS amp SERVICES DIVISION P O Box 1819 Rosenberg Texas 77471 USA 1 281 633 4500 fax 1 281 633 4588 e mail sales fwmurphy com MURPHY DE MEXICO S A DE C V Blvd Antonio Rocha Cordero 300 Fracci n del Aguaje San Luis Potosi S L P M xico 78384 52 444 8206264 fax 52 444 8206336 Villahermosa Office 52 993 3162117 e mail ventas murphymex com mx www murphymex com mx CLEAN Oil Supply Tank Height above LR recommended 2 ft 0 6 m minimum and 25 ft 7 7 m maximum Shutoff Crankcase NOTE LR857 shown mounted using a pipe bracket FRANK W MURPHY LTD Church Rd Laverstock Salisbury SP1 1QZ U K 44 1722 410055 fax 44 1722 410088 e mail sales fwmurphy co uk www fwmurphy co uk A ISO 900 REGISTERED O UK ISO 9001 20 2 Printed in U S A 850740B In order to consistently b
3. Maintain Lube Level LR 7225B Revised 03 05 Catalog Section 15 00 02 0063 _ gt Description Murphy LR857 Lube Level Regulator maintains the crankcase oil level of an engine pump or compressor Adjusted to the correct running oil level the LR857 will replenish oil as it is used An integral low level switch will alarm and or shut down the equipment if supply oil is lost and the equipment continues to use oil Application The LR857 maintains oil level on any size engine but is recommended for small to medium volume applications and installations that require a 3 wire snap action switch How the LR857 Maintains Levels As crankcase oil level drops the LR857 float also drops and opens the Thumb Valve This allows oil to flow from the supply tank through the LR857 and into the crankcase When proper level is attained in the crankcase the LR857 float rises causing the Thumb Valve to close off fur ther oil flow The simple and unique Thumb Valve is non clogging and provides a positive leak free seal Flow rate through the s inch 3 mm orifice is significant to allow crankcase refill through the LR857 Model LR857 Specifications Inlet Connection 5 8 in 16 mm LD hose Outlet Connection 3 8 NPT Snap switch SPDT rating 10 A 125 VAC 0 5 A 125 VDC 10 A 30 VDC Conduit Connection 1 2 NPT Case Die cast aluminum Lens Polycarbonate Float Brass Flow Rates see chart
4. ibility except as noted MURPHY gt Dimensions 4 15 16 in 125 mm 1 2 NPT Electrical Conduit Connection 3 8 NPT Outlet Connection 71 mm _ i 9 32 in 7 mm Mounting Brackets with Hardware 5 8 in 16 mm 1 D Inlet Hose Connection 1 4 NPT Internal Threads Murphy offers two mounting brackets for the LR857 The 15000238 Pipe Bracket Kit fits a 7 8 in 22 mm diameter pipe see typical installation below The 15010224 universal Flange Kit allows various mounting methods Diameter Holes 2 places aan 15000238 iii Pipe Bracket Kit 114mm _ Hole 88 in iti i 22 mm dia Additional Hardware Supplied 2 1 4 20 x 7 8 inch 250in 22 mm screws 64mm 2 1 4 20 x 1 inch minimum bottom surface j 25 mm screws Plug 2 places AD 4 1 4 20 hex nuts 3 8 NPT 1 preo NG 4 1 4 inch 6 mm P dia split washer 15010224 Universal Flange Kit Slot 390 in 10 mm Additional Hardware Supplied 2 1 4 20 x 1 1 4 inch x 2 in 51 mm 4 places Slot 390 in 10 M 32 mm bolts x 4 71 in 120 mm 4 1 4 dia flat washer Spaces S i m 2 1 4 20 hex nuts 2 5 16 18 x 1 1 4 inch 32 mm bolts 4 5 16 dia flat washer 2 5 16 18 hex nuts How to Order Specify model LR857 Accessories Specify part number Description Part Number Fittings Kit 15000420 Pipe Bracket Kit 15000238 Universal Flange Kit 15010224 Replacement Parts Specify
5. ring you the highest quality full featured products we reserve the right to change our specifications and designs at any time LR 7225B page 2 of 2
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