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AP Diving Ltd. APV300 Inflator Maintenance Manual APV300 Inflator Maintenance Manual Version 0.3 December 2015 Written by Tino de Rijk Page 1 of 29...
1.2 Servicing ......................4
1.3 Warranty ......................4
1.4 Copyright and Applicable Law ................ 4
2. APV300 inflator Exploded Diagram and Parts List ....... 5 2.1 APV300 inflator Main Assembly ..............5
2.2 AP50 Inflator Hose Assembly ................. 6
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AP Diving Ltd. APV300 Inflator Maintenance Manual 6.7 Put direct feed body into main moulded body ..........22
6.8 Put direct feed button into direct feed body ..........23
6.9 Fit new blue button cap ................23
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1. Introduction 1.1 Functional description The APV300 low profile power inflator is derived from the original A.P.Valve. It has been ergonomically restyled but continues to be an excellent BCD power inflator with a new very low profile. The APV300 is a replacement part for post-2007 (BUDDY and AP Diving) BCD’s.
AP Diving Ltd. APV300 Inflator Maintenance Manual 2. APV300 inflator Exploded Diagram and Parts List 2.1 APV300 inflator Main Assembly NUMBER DESCRIPTION PART NUMBER QUANTITY Button APV-100-31 Spring AP-100-36 Stem APV-300-2 Back end rubber AP-100-38 APV300 moulded body APV-300-1 Back end washer...
O-rings for the APV300 inflator. If, against our recommendation, you choose to select your O-rings to come from another source than AP Diving Ltd., make sure you select the right type in size AND hardness AND material (composition). The main service kit for the APV300 inflator has part number APV300A:...
A very good cleaning fluid is Biox “O2” immersion fluid. See WWW.BIOXINT.COM for further information and distributors. The use of rubber gloves while re-assembling the APV300 inflator is recommended to avoid rendering the APV300 inflator oxygen unclean due to human touch.
AP Diving Ltd. APV300 Inflator Maintenance Manual 4. Disassembly Instructions 4.1 Remove stainless steel pin (if fitted) that holds the pull cord to the dumping elbow Push the stainless steel pin out of the main body. The pin can be just pushed out. It is not screwed in; it is held in place by friction.
AP Diving Ltd. APV300 Inflator Maintenance Manual 4.3 Remove inlet stem from main body Pull it out straight. 4.4 Remove O-ring from inlet stem This O-ring needs to be replaced during service. 4.5 Unscrew cap retainer from main body Unscrew counter-clockwise.
AP Diving Ltd. APV300 Inflator Maintenance Manual 4.6 Remove blue button cap Just pull it off. The blue cap needs to be replaced during service. 4.7 Remove direct feed button from direct feed body Just pull it out. 4.8 Remove direct feed body from main moulded body Shake the main body a bit, and the feed body will drop out.
AP Diving Ltd. APV300 Inflator Maintenance Manual 4.9 Remove O-ring and mesh filter from direct feed body Both the O-ring and the mesh filter need to be replaced during service. 4.10 Unscrew core valve from direct feed body Use tool AP50E tool or equivalent to unscrew the core valve out of the feed body.
AP Diving Ltd. APV300 Inflator Maintenance Manual 4.11 Remove back end washer from stem Use pliers to squeeze the split end of the stem together while simultaneously pushing it down, out of the washer that is holding it in place.
4.15 Unscrew stem with back end rubber from button Unscrew counter-clockwise. Both the stem and the white back end rubber fitted to it need to be replaced during service This completes the disassembly of the APV300 inflator Page 14 of 29...
AP Diving Ltd. APV300 Inflator Maintenance Manual AP50 Medium Pressure (MP) hose disassembly 4.16 Remove circlip from snap connector body Use small pliers to remove the circlip from the snap connector body. Take care not to widen the circlip, as it will otherwise not be usable again during assembly.
AP Diving Ltd. APV300 Inflator Maintenance Manual 4.18 Remove spring from snap connector body Just pull it off. Make sure you do not inadvertently let the ball bearings drop out in the process. 4.19 Remove 4 ball bearings from snap connector body Use a small tray to catch the ball bearings to avoid loosing them.
AP Diving Ltd. APV300 Inflator Maintenance Manual 4.21 Remove O-ring from snap connector body Carefully use a curved O-ring pick to remove this O-ring, taking care NOT to scratch the bore of the O-ring groove or valve body. This O-ring needs to be replaced during service.
23.5% or higher should be treated as 100% oxygen. So only if you are absolutely sure that the APV300 will never be exposed to an oxygen percentage of more than 23.5% can you disregard the rules of keeping equipment in oxygen service.
AP Diving Ltd. APV300 Inflator Maintenance Manual 5.2 Ultrasonically clean deposits from all metal parts Clean deposits from all metal parts, like chalk and salt. WARNING: Do NOT use aggressive chemicals. They might damage the metal plating. Use an ultrasonic cleaning bath with a suitable cleaning fluid instead. A good cleaning fluid is Biox “O2”...
APV300 Inflator Maintenance Manual 6. Assembly Instructions WARNING: When assembling the APV300 inflator, use rubber gloves to avoid polluting it while assembling, rendering it not oxygen-clean anymore. For photographic clarity no rubber gloves are worn on the photos in this manual.
AP Diving Ltd. APV300 Inflator Maintenance Manual 6.3 Push stem assembly into moulded body Just push it into the main body and keep it in place with your thumb against the force of the spring for the next action. 6.4 Push new back end rubber and back end washer onto stem Never re-use the old back end rubber.
AP Diving Ltd. APV300 Inflator Maintenance Manual 6.5 Screw new core valve into direct feed body Use tool AP50E or equivalent to screw a new core valve into the direct feed body. Screw clockwise. Do not use force. 6.6 Put new O-ring and mesh filter into direct feed body Put a new mesh filter and slightly greased O-ring (in that order) into the direct feed body.
AP Diving Ltd. APV300 Inflator Maintenance Manual Make sure that the end with the newly fitted core valve is facing the opening, as it will take the direct feed button in the next step. 6.8 Put direct feed button into direct feed body Just push it in, over the visible exposed end of the core valve.
AP Diving Ltd. APV300 Inflator Maintenance Manual 6.10 Screw new cap retainer onto main body Screw clockwise. The retainer should be done up tight using a torque of 2 Nm, which is as tight as possible using your fingers PLUS nipping it up with a suitable tool.
If a pull cord to a dumping elbow valve was used, make sure to thread the pin first through the loop in the end of the cord before pushing it back in place. This completes the re-assembly of the APV300 inflator Page 25 of 29...
AP Diving Ltd. APV300 Inflator Maintenance Manual AP50 hose assembly 4.15 Fit new O-ring onto snap connector body Fit a new lightly greased O-ring to the inside of the snap connector body. 4.16 Screw new Schraeder valve into snap connector body Use tool AP50E or equivalent to screw a new Schraeder valve into the snap connector body.
AP Diving Ltd. APV300 Inflator Maintenance Manual 4.18 Put spring onto snap connector body Again: make sure you do not lose one of the 4 ball bearings during this step. 4.19 Push sliding collar onto snap connector body The collar can only go on in one way. Push it on with the wider opening facing the hose, and the smaller opening facing the circlip, to be fitted in the next step.
AP Diving Ltd. APV300 Inflator Maintenance Manual 6.21 Test spring operation and hose sealing by pushing complete hose on and off the Inflator unit If assembled correctly, the sliding collar should jump forward while pushing / sliding it onto inlet stem of the inflator.
AP Diving Ltd. APV300 Inflator Maintenance Manual 7. Testing Instructions 7.1 Test for leaks and proper operation 1. Connect a pressurized MP hose to the inflator. a) The MP should be around 9 bar. 2. Press the blue button. Check for gas coming out, and stopping again after button release.
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