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Страница: 23 / 24

801-B00 Page 23/24

TROUBLESHOOTING …

continued

SYMPTOM PROBABLE

CAUSE

Broken Shaft

1. Foreign

objects

entering the pump.

2. Relief valve not opening.

3. Hydraulic hammer - pressure spikes.

4. Pump/driver,

driveline/drive shaft misalignment.

5. Excessively worn vanes or vane slots.

Mechanical Seal Leakage

1. O-rings not compatible with the liquids pumped.

2. O-rings nicked, cut or twisted.

3. Shaft at seal area damaged, worn or dirty.

4. Bearings over greased.

5. Excessive

cavitation.

6. Mechanical seal faces cracked, scratched, pitted or dirty.

Overload on Motor

1. Motor Horsepower not sufficient for application.

2. Improper wiring and/or low voltage to motor.

3. Misalignment

4. Excessive pressure or speed.

5. Bearing

locknuts

adjusted improperly.

6. Faulty or worn bearings.

7. Rotor rubbing against discs or liner.

8. Dirty mechanical seal faces.

Содержание SGLD2

Страница 1: ...m Blackmer s website www blackmer com or by contacting Blackmer Customer Service SAFETY DATA This is a SAFETY ALERT SYMBOL When you see this symbol on the product or in the manual look for one of the following signal words and be alert to the potential for personal injury death or major property damage Warns of hazards that WILL cause serious personal injury death or major property damage Warns of...

Страница 2: ...e If pumping hazardous or toxic fluids system must be flushed and decontaminated inside and out prior to performing service or maintenance Hazardous or toxic fluids can cause serious injury PUMP DATA PUMP IDENTIFICATION A pump Identification tag containing the pump serial number I D number and model designation is attached to each pump It is recommended that the data from this tag be recorded and ...

Страница 3: ...not contain any upward loops Minimize the number of intake line fittings and eliminate restrictions such as sharp bends globe valves unnecessary elbows and undersized strainers 3 A strainer must be installed in the inlet line to protect the pump from foreign matter The strainer should be located at least 24 0 6m from the pump and have a net open area of at least four times the area of the intake p...

Страница 4: ...e the relief valve cap loosen the locknut and turn the adjusting screw inward or clockwise Replace the valve cap and O ring 2 To DECREASE the pressure setting remove the relief valve cap loosen the locknut and turn the adjusting screw outward or counterclockwise Replace the valve cap and O ring Refer to the individual Blackmer pump parts lists for various spring pressure ranges Incorrect settings ...

Страница 5: ... tool or dial indicator is preferred If a laser alignment tool or dial indicator is not available use a straightedge Turn both shafts by hand checking the reading through one complete revolution Maximum offset should be less than 0005 0 127 mm 2 Angular alignment Insert a feeler gauge between the coupling halves Check the spacing at 90 increments around the coupling four checkpoints Maximum variat...

Страница 6: ... slight spillage of the oil so a drip pan and or absorbent materials should be placed appropriately Once purged tighten all fittings to prevent leaks The Plan 53 seal design requires the barrier fluid to be pressurized above pump discharge pressure at all times Failure to do so may result in primary seal failure and product leakage Hazardous or toxic fluids can cause serious injury 6 For the Plan ...

Страница 7: ...ice and replaced 11 Connect and set a pressure switch to a set point of approx 10 psig This pressure switch should be wired to a panel or warning light or alarm to prevent the barrier pressure from exceeding the process pressure This would prevent barrier fluid leaking into the system or process fluid from contaminating the barrier oil due to the outer seal opening Note A suitable orifice should b...

Страница 8: ...hould be within the range given in Table 1 for a properly tensioned drive A new set of belts should be initially tensioned to the upper limit SMALL SHEAVE OUTSIDE DIAMETER BELT DEFLECTION FORCE Minimum Maximum 2 5 to 4 5 63 mm to 114 mm 3 0 lbs 1 4 kgs 4 75 lbs 2 2 kgs 4 75 to 7 0 121 mm to 178 mm 4 0 lbs 1 8 kgs 6 0 lbs 7 7 kgs Table 1 Deflection Force Per Belt 8 Check again to ensure the sheaves...

Страница 9: ...ing within the expected parameters Record flow rate in the Initial Start Up section of this manual 8 Close the discharge valve and check the differential pressure across the pump Pressure must not exceed the pressure setting of the external bypass valve 9 If dual seals are installed recheck barrier pressure and shut pump off if barrier pressure drops continuously which would indicate a seal leak 1...

Страница 10: ... 5 The yokes of the universals at both ends of the jack shaft must be parallel and in phase 6 The maximum recommended angle between the jack shaft and the pump shaft is 15 degrees See Table 2 Failure to follow any of these guidelines may result in a gallop or uneven turning of the pump rotor which will in turn cause a surging vibration to the liquid stream and piping system Contact the supplier of...

Страница 11: ...the pump Confirm proper pump rotation by checking the pump rotation arrows 4 Check the pump speed Pump speed must never exceed the recommended maximum See Technical Data section of this manual 5 Check the pressure gauges to ensure the system is operating within expected parameters Record the gauge readings in the Initial Start Up Information section of this manual for future reference 6 Inspect pi...

Страница 12: ...re repainted in the field ensure that the grease relief fittings 76A are functioning properly after painting Do NOT paint them closed Remove any excess paint from the fittings Pump bearings and hydraulic motor couplings if equipped must be lubricated every three months at a minimum More frequent lubrication may be required depending on the application and the operating conditions Pumps outfitted w...

Страница 13: ... and b on the opposite shaft end For Single Seal Pump Follow Steps 6 11 For Double Seal Pump Skip to Step 12 Single Seal Disassembly 6 Remove the head capscrews 21 and carefully pry the head 20 away from the casing 12 7 Slide the head 20 off the shaft The head O ring 72 bearing 24 mechanical seal stationary seat and stationary O ring 153A 153D will come off with the head assembly On 4 inch models ...

Страница 14: ... replacement and reassembly NOTICE The rotor and shaft weighs 34 69 pounds 15 31 kg Be careful not to pinch the hand under the rotor and shaft when removing from casing 16 Lay the pump flat with the remaining head 20 facing upward to remove the head assembly mechanical seal 153 and disc 71 from the outboard side of the pump per steps 6 8 above 17 If necessary remove the liner 41 by tapping around ...

Страница 15: ...nd shaft 13 into the pump casing 12 d Install the remaining vanes 14 into the top positions of the rotor Figure 12 Pushrod Installation 6 DISC 2 and 3 inch pumps Install the disc 71 on the inboard side of the pump with the seal cavity facing outward and the disc relief hole located as shown in Figure 13 Figure 13 Disc Relief Hole Location 2 and 3 pumps 7 MECHANICAL SEAL 2 and 3 inch pumps Rotating...

Страница 16: ...th a soft faced mallet until the correct position is found Install the remaining head capscrews 21 for each head 20 and uniformly torque to 30 lbs ft 40 7 Nm 17 LOCKNUT ADJUSTMENT It is important that the bearing locknuts 24A and lockwashers 24B be installed and adjusted properly Overtightened locknuts can cause bearing failure or a broken lockwasher tang Loose locknuts will allow the rotor to shi...

Страница 17: ...e without guard in place 23 RELIEF VALVE ASSEMBLY a Insert the valve 9 into the relief valve bore of the casing with the fluted end 2 and 3 inch pumps or stepped bore end 4 pumps inward b Install the relief valve spring 8 and spring guide 7 against the valve c Attach a new relief valve O ring 10 and the valve cover 4 on the cylinder d Screw the relief valve adjusting screw 2 with locknut 3 into th...

Страница 18: ...or 7 Install a new head O ring 72 in the groove on the inside face of the inboard head ring 20A Lay the O ring flat and start in on one side of the groove stretching ahead with the fingers as shown in Figure 15 8 Attach the inboard head ring 20A to the casing per step 4 Groove should be toward the discharge port Install and hand tighten four head capscrews 21 90 degrees apart 9 MECHANICAL SEAL Dua...

Страница 19: ... tight and should be alternately loosened one stop at a time 001 25 microns Begin by loosening the locknut adjusted last 14 Inspect the grease seal 104 for wear or damage and replace as required Grease the outside diameter of the grease seal and push it into the inboard bearing cover 27 with the lip of the seal inward 15 Attach a new bearing cover gasket 26 and the bearing cover 27 to the seal car...

Страница 20: ...all Lockwasher 24B and Locknut 24A onto Rotor Shaft 12 Install the Inboard seal by following steps 1 11 Figure 18 Plan 52 Stationary Seal Assembly Installation 13 LOCKNUT ADJUSTMENT It is important that the bearing locknuts 24A and lockwashers 24B be installed and adjusted properly Overtightened locknuts can cause bearing failure or a broken lockwasher tang Loose locknuts will allow the rotor to s...

Страница 21: ...r property damage or death Do not operate without guard in place 19 RELIEF VALVE ASSEMBLY f Insert the valve 9 into the relief valve bore of the casing with the fluted end 2 and 3 inch pumps or stepped bore end 4 pumps inward g Install the relief valve spring 8 and spring guide 7 against the valve h Attach a new relief valve O ring 10 and the valve cover 4 on the casing 21 i Screw the relief valve...

Страница 22: ...ing properly 7 External Bypass Valve set too low 8 Operating without a vapor return line 9 Vanes installed incorrectly see Vane Replacement 10 Liner installed backwards Noise 1 Excessive pressure drop on the pump due to a Undersized or restricted fittings in the inlet line b Pump speed too fast c Pump too far from fluid source 2 Running the pump for extended periods with a closed discharge line 3 ...

Страница 23: ...compatible with the liquids pumped 2 O rings nicked cut or twisted 3 Shaft at seal area damaged worn or dirty 4 Bearings over greased 5 Excessive cavitation 6 Mechanical seal faces cracked scratched pitted or dirty Overload on Motor 1 Motor Horsepower not sufficient for application 2 Improper wiring and or low voltage to motor 3 Misalignment 4 Excessive pressure or speed 5 Bearing locknuts adjuste...

Страница 24: ... 215 GPM HXL 6 8 10 Sliding Vane Pumps 130 to 2 220 GPM Refineries Terminals Barges Ships Reciprocating Gas Compressors Liquefied Gas Transfer Boosting Vapor Recovery Hand Operated Pumps Dispensing Transfer In line Accessories Gear Reducers Bypass Valves Strainers Visit www blackmer com for complete information on all Blackmer products 1809 Century Avenue Grand Rapids Michigan 49503 1530 U S A Tel...

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