Operating Instructions UCA Charging & Gauging Kit
Contents
1. Hydraulics Bulletin HY07 1244 T1 UK Operating Instructions UCA Charging amp Gauging Kit Effective 01 July 2001 For use with Piston Bladder amp Diaphragm Accumulators Warning FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS AND OR SYSTEMS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH PERSONAL INJ URY AND PROPERTY DAMAGE This document and other information from Parker Hannifin Corporation its subsidiaries and authorized distributors provide product and or system options for further investigation by users having technical expertise It is important that all aspects of the application are analysed and the information concerning the product or system in the current product catalogue is reviewed Due to the variety of operating conditions and applications for these products or systems the user through its Own analysis and testing is solely responsible for making the final selection of the products and systems and assuring that all performance safety and warning requirements of the application are met The products described herein including without limitation product features specifications designs availability and pricing are subject to change by Parker Hannifin Corporation and Its subsidiaries at any time without notice Bulletin HY07 1244 T1 UK Introduction Description The UCA universal charging amp gauging kit is required to check the precharge pressure of an accumulator and to2. Piston accumulators Assemble the short adapter and adapter insert 3 and 4 screw onto the gas valve 16 and hand tighten 5 Screw the UCA onto the adapter Position the assembly to permit easy reading of the gauge then hand tighten the knurled collar 7 Darker Hydraulics Charging amp Gauging Kit UCA 6 Open the inflation valve A by screwing the handwheel clockwise until the inflation pressure registers on the gauge Readings and Results One of three conditions will apply the precharge pressure in the accumulator will be correct or it will be too high or too low Nitrogen Pressure p is Correct 1 Screw the handwheel A anti clockwise to close the accumulator gas valve 2 Slacken the bleed valve B to release pressure in the UCA Unscrew the UCA from the adapter Unscrew the adapter s from the accumulator gas valve Nitrogen Pressure p is Too High 1 Slacken the bleed valve B to vent nitrogen from the accumulator until after stabilization the desired pressure P Is registered Nitrogen vents into the air 2 Tighten the bleed valve B once the desired filling pressure is reached 3 Screw the handwheel A anti clockwise to close the accumulator gas valve Slacken the bleed valve B to release pressure in the UCA Unscrew the UCA from the adapter 6 Unscrew the adapter s from the accumulator gas valve Nitrogen Pressure p is Too Low 1 Close the inflation valve A by screwing the handwheel an
3. fill and vent the nitrogen It is suitable for all Parker piston and bladder accumulators and other commercially available accumulators with M28 x 1 5 7 8 14 UNF 5 8 18 UNF or 0 305 32 UNS 8V1 Vg 8 gas valves operating up to a maximum working pressure of 340 bar The UCA assembly is screwed onto the accumulator s gas valve and connected to the nitrogen source with the hose Supplied If the precharge pressure is only to be checked or reduced the connection hose is not required The standard charging and gauging kit is supplied in a case containing a UCA universal charging amp gauging kit with M28 x 1 5 gas port connection two pressure gauges 0 25 bar and 0 250 bar three adapters for connection to the accumulator gas valve 7 8 14 UNF 5 8 18 UNF 0 305 32 UNS a 2 5m long hose for connection to a nitrogen source a 6mm A F hexagon wrench asetof spare seals where a different pressure range is required a commercially available pressure gauge may be used Safety Charging must be carried out by qualified personnel Before taking any readings or pressurizing with nitrogen the accumulator must be isolated from the hydraulic system and the fluid side discharged in order to depressurize it Use only nitrogen N to pressurize the accumulator Danger of Explosion Never Charge with Oxygen The types of nitrogen permitted are type S 99 8 pure type R 99 99 pure type U 99 993 pure I
4. the Precharge Pressure Warning Stabilization The process of charging or discharging an accumulator with nitrogen causes a temperature change which is transmitted to the surrounding air as the temperature of the accumulator Stabilizes To allow for the effects of temperature transfer the accumulator should be allowed to stand fora minimum of 15 minutes before a final reading of the precharge pressure is taken Bladder or Piston Accumulators with Schrader type Valve Figures 1 2a amp 2b Gas valve 13 gt y Wy WD AE ae Lae wm en Z og s aN Figure 2a Bladder accumulator with Schrader type gas valve Protective cover 14 Gas valve cap 15 oa Gas valve 16 Figure 2b Piston accumulator with Schrader type gas valve 1 Unscrew the caps 11 and 12 from a bladder accumulator or the protective cover and cap 14 and 15 from a piston accumulator to gain access to the gas valve 13 or 16 2 Select the appropriate pressure gauge 5 for the pressure to be checked remove the protective cap 6 and attach the gauge to the UCA 1 3 Make sure that the bleed valve B is fully closed and that the inflation valve A is in the fully raised position by turning the handwheel in an anti clockwise direction 4 Bladder accumulators Ensure that the o ring is correctly positioned in the base of the long adapter 2 screw the adapter on to the gas valve 13 and hand tighten
5. ed Refit the protective cap 21 to the accumulator gas valve Parker Hannifin plc Cylinder Division Watford Herts Bulletin HY07 1244 T1 UK Charging amp Gauging Kit Correction Factors UCA Calculation of Correction Factors at Full Pressure where p t precharge pressure at working temperature t 2 p t t jlo 2 3 p t xK P t precharge pressure at precharge temperature t t 273 K correction factor Table of Correction Factors Precharge Temperature t C Operating Temperature t C Example Warning Stabilization Satisfactory system operation requires a precharge pressure of The process of filling or discharging an accumulator with 100 bar The operating temperature t is 50 C and the temper nitrogen causes a temperature change which is transmitted to ature at precharging t is 20 C From the table a correction the surrounding air as the temperature of the accumulator factor of 0 91 should be applied giving a precharge pressure stabilizes To allow for the effects of temperature transfer the at 20 C of 91 bar accumulator should be allowed to stand for a minimum of 15 minutes to allow the temperature to stabilize before a final Gas Bottle Fittings and Part Numbers reading of the precharge pressure is taken To meet the requirements of different markets Parker s UCA i o Charging and Gauging Kits are supplied with an adapter
6. er 17 where fitted and cap 18 from the accumulator gas valve 19 2 Assemble the short adapter and adapter insert 3 and 4 and screw onto the accumulator gas valve 3 Select the appropriate pressure gauge 5 for the pressure to be checked remove the protective cap 6 and attach the gauge to the UCA 1 Make sure that the bleed valve B is fully closed The position of inflation valve A can be ignored as it does not affect this procedure 4 Screw the UCA onto the adapter Position the assembly to permit easy reading of the gauge then hand tighten the knurled collar 7 5 Open the accumulator gas valve by turning the hexagonal poppet valve adjuster nut 20 anti clockwise until the inflation pressure registers on the gauge Note for 360mm bore accumulators a 19mm A F spanner approximately 120mm long should be used to turn the valve adjuster nut 20 Protective cover 17 Protective cap 18 Gas valve 19 Adjuster nut 20 Figure 3 Poppet type accumulator gas valve Readings and Results One of three conditions will apply the precharge pressure in the accumulator will be correct or it will be too high or too low Nitrogen Pressure p is Correct 1 Close the accumulator gas valve by turning the poppet valve adjuster nut 20 clockwise 2 Slacken the bleed valve B to release pressure in the UCA 3 Unscrew the UCA from the adapter 4 Unscrew the adapter 3 and adapter insert 4 from the accumulator
7. f the precharge pressure is taken 8 Close the accumulator gas valve by screwing the adjuster nut 20 clockwise 9 Slacken the bleed valve B to release pressure in the UCA 10 Remove the hose 9 carefully to release internal pressure 11 Refit the knurled cap 8 to the filling port valve 10 12 Unscrew the UCA from the adapter 13 Unscrew the adapter 3 and adapter insert 4 from the accumulator gas valve 19 After removing the UCA and adapters make sure thatthe accumulator gas valve is sealing effectively Refitthe protective cap 18 and protective cover 17 to the accumulator gas valve 19 Parker Hannifin plc Cylinder Division Watford Herts Bulletin HY07 1244 T1 UK Pressure Adjustment Diaphragm Accumulators Figures 1 amp 4 The following instructions apply only to diaphragm accumulators fitted with a socket headed screw type gas valve as Illustrated in Figure 4 Cap 21 Gas valve socket headed screw 22 NG a wa Le K as Figure 4 Diaphragm accumulator with socket headed screw gas valve Danger do not attempt to loosen the gas valve screw with a hexagon wrench as it could be ejected under extreme pressure 1 Select the appropriate pressure gauge 5 for the pressure to be checked remove the protective cap 6 and attach the gauge to the UCA 1 Make sure that the bleed valve B is fully closed 2 Unscrew the cap 21 from the accumulator gas valve Release b
8. f the pressure of the gas contained in the nitrogen bottle is greater than the maximum permissible operating pressure of the accumulator a pressure regulator must be fitted to the nitrogen bottle Parker recommends that the precharge should be checked during the first week following commissioning of the system Thereafter it should be checked after three months and then at intervals of 12 months or less as considered appropriate by the system builder The Effect of Temperature on Precharge Pressure In order to compensate for the difference in pressure at ambient and operating temperatures it is recommended that the precharge pressure p should be adjusted to reflect the operating temperature of the system using the correction factor equations and table on page 7 Darker Hydraulics Charging amp Gauging Kit UCA XXX Kee Se genene mates Seietetetetel Renen ERS J 7 8 14 UNF TT 4 ER 0 305 32 UNS 8V1 Vg 8 Figure 1 Universal Charging and Gauging Kit assembly Controls A Inflation valve B Bleed valve Key 1 UCA 2 Adapter long 3 Adapter short 4 Adapter insert 5 Pressure gauge 6 Knurled protective cap gauge port 7 Knurled collar gas port 8 Knurled protective cap filling port 9 Filling hose G1 4 fitting 60 cone 10 Filling port valve Parker Hannifin plc Cylinder Division Watford Herts Bulletin HY07 1244 T1 UK Pressure Adjustment To Check and Adjust
9. gas valve 19 Darker Hydraulics Charging amp Gauging Kit UCA Nitrogen Pressure p is Too High 1 Slacken the bleed valve B to vent nitrogen from the accumulator until after stabilization the desired pressure Po is registered Nitrogen vents into the air 2 Tighten the bleed valve B once the desired filling pressure is reached 3 Close the accumulator gas valve by screwing the adjuster nut 20 clockwise 4 Slacken the bleed valve B to release pressure in the UCA 5 Unscrew the UCA from the adapter 6 Unscrew the adapter 3 and adapter insert 4 from the accumulator gas valve 19 Nitrogen Pressure p is Too Low 1 Close the accumulator gas valve by screwing the poppet valve adjuster nut 20 clockwise 2 Remove the knurled cap on the filling port 8 3 Connect the end of the filling hose 9 to the filling port valve 10 4 Connect the other end of the hose to the nitrogen source 5 Progressively open the valve on the nitrogen source 6 Open the accumulator gas valve by screwing the adjuster nut 20 anti clockwise to admit the pressurized gas taking particular care if the accumulator has a small Capacity or is of the low pressure type lt 40 bar 7 When pressure p is reached close the valve on the nitrogen source To allow for the effects of temperature transfer the accumulator should be allowed to stand fora minimum of 15 minutes to allow the temperature to stabilize before a final reading o
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11. ti clockwise 2 Remove the knurled cap on the filling port 8 3 Connect the end of the filling hose 9 to the filling port valve 10 Connect the other end of the hose to the nitrogen source Progressively open the valve on the nitrogen source Screw the handwheel A clockwise to admit the pressu rized gas taking particular care if the accumulator has a Small capacity or Is of the low pressure type lt 40 bar 7 When pressure p is reached close the valve on the nitrogen source To allow for the effects of temperature transfer the accumulator should be allowed to stand fora minimum of 15 minutes to allow the temperature to stabilize before a final reading of the precharge pressure is taken 8 Screw the handwheel A anti clockwise to close the accumulator gas valve 9 Slacken the bleed valve B to release pressure in the UCA 10 Remove the hose carefully to release internal pressure 11 Refit the knurled cap 8 to the filling port valve 10 12 Unscrew the UCA from the adapter s 13 Unscrew the adapter s from the accumulator gas valve After removing the UCA and adapter s make sure that the accumulator gas valve 13 or 16 Is sealing effectively Refit the protective cap s 11 12 15 and cover 14 where applicable Parker Hannifin plc Cylinder Division Watford Herts Bulletin HY07 1244 T1 UK Pressure Adjustment Piston Accumulators with tad ea a Valve Figures 1 amp 3 Unscrew the protective cov
12. to Technical Specification suit the appropriate gas bottle fitting Maximum pressure 340 bar Accumulator connection 7 8 14 UNF 5 8 18 UNF Country Gas Bottle Fitting Part No 0 305 32 UNS M28 x 1 5 UK 5 8 BSP male UCA 02 UCA nitrogen bottle hose 2 5m long approx Nitrogen bottle connection 5 8 BSP with o ring seal France W 21 7 x 1 14 female UCA 04 UK part no UCA 02 Pressure gauges Two 638mm dia glycerine bath Germany W 24 32 x 1 14 female UCA 01 type 0 25 and 0 250 bar 1 6 Italy W 21 7 x 1 14 male UCA 05 US 0 960 x 1 14 male UCA 03 7 Parker Hannifin plc Cylinder Division H yd raulics Watford Herts Need a Parker part Call Parker s European Product Information Centre on 00800 27 27 5374 Visit us at www parker com Hydraulics Cylinder Division Sales Offices Austria Marchtrenk Parker Hannifin GmbH Tel 7242 56921 Fax 7242 5692120 Belgium Brussels Parker Hannifin SA NV Tel 67 280 900 Fax 67 280 999 Czech Republic Prague Parker Hannifin Corporation Tel 02 830 85 221 Fax 02 830 85 360 Denmark Ish j Parker Hannifin Danmark A S Tel 43 56 04 00 Fax 43 73 31 07 Finland Vantaa Parker Hannifin Oy Tel 9 476 731 Fax 9 476 73200 France Contamine sur Arve Parker Hannifin SA Tel 4 50 25 80 25 Fax 4 50 03 67 37 Germany Cologne Parker Hannifin GmbH Tel 221 71720 Fax 221 7172219 Hungary Budapest Pa
13. ut do not loosen the socket headed gas valve screw 22 using the 6mm hexagon wrench supplied 3 Screw the knurled collar 7 on the base of the UCA 1 onto the accumulator gas valve Ensure that the male hexagon in the base of the UCA engages with the female hexagon in the accumulator gas valve 22 4 Open the inflation valve A by screwing the handwheel anti clockwise until the inflation pressure registers on the gauge Readings and Results One of three conditions will apply the precharge pressure in the accumulator will be correct or it will be too high or too low Nitrogen Pressure p is Correct 1 Screw the handwheel A clockwise to close the accumulator gas valve Slacken the bleed valve B to release pressure in the UCA Unscrew the UCA from the accumulator gas valve 4 Using the 6mm hexagon wrench supplied ensure that the hexagon socket headed gas valve screw 22 is firmly tightened Refit the protective cap 21 to the accumulator gas valve Darker Hydraulics Charging amp Gauging Kit UCA Nitrogen Pressure p is Too High 1 Slacken the bleed valve B to vent nitrogen from the accumulator until after stabilization the desired pressure P Is registered Nitrogen vents into the air 2 Tighten the bleed valve B once the desired filling pressure is reached 3 Screw the handwheel A clockwise to close the accumulator gas valve 4 Slacken the bleed valve B to release pressure in the UCA Unscre
14. w the UCA from the accumulator gas valve Using the 6mm hexagon wrench supplied ensure that the hexagon socket headed gas valve screw 22 Is firmly tightened Refit the protective cap 21 to the accumulator gas valve Nitrogen Pressure p is Too Low 1 Close the inflation valve A by screwing the handwheel clockwise 2 Remove the knurled cap 8 on the filling port 3 Connect the end of the filling hose 9 to the filling port valve 10 Connect the other end of the hose to the nitrogen source Progressively open the valve on the nitrogen source Screw the handwheel A anti clockwise to admit the pressurized gas taking particular care if the accumulator has a small capacity or is of the low pressure type lt 40 bar 7 When pressure p is reached close the valve on the nitrogen source To allow for the effects of temperature transfer the accumulator should be allowed to stand fora minimum of 15 minutes to allow the temperature to stabilize before a final reading of the precharge pressure is taken 8 Screw the handwheel A clockwise to close the accumu lator gas valve 9 Slacken the bleed valve B to release pressure in the UCA 10 Remove the hose carefully to release internal pressure 11 Refit the knurled cap 8 to the filling port valve 10 12 Unscrew the UCA from the accumulator gas valve 13 Using the 6mm hexagon wrench supplied ensure that the hexagon socket headed gas valve screw 22 Is firmly tighten
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