Repair manual
Table Of Contents
- Contents
- Introduction
- Safety Precautions
- General Procedures
- Maintenance Schedules
- Initial Inspection and Pre-Test
- Infrequently Used Regulators
- Work Area & Required Tools
- O-ring Removal
- Lubrication
- Table 1 – Recommended Tools
- Table 2 – Lubricant and Cleaner
- Disassembly Procedures
- Cleaning & Inspection Procedures
- Reassembly Procedures
- Final Adjustment and Testing Procedures
- Table 3 – Troubleshooting
- Repair & Replacement Parts
- Schematic Drawing
8
Apeks Regulator Service and Repair Manual
Figure 4
Removing Diaphragm
Figure 5
Removing HP Balance Plug
Figure 6
Removing Yoke Connector
DO NOT attempt to pry the diaphragm out of the valve body with a
metal instrument. Doing so can permanently damage the seating shoul-
der, requiring replacement of the valve body.
10. Remove the valve lifter(10) from the body and set aside. Loosen the
vise to turn the first stage over, and re-secure it so that the flat end
(top) faces straight up.
11. Apply a 6mm hex key to the HP balance plug(17), and turn the plug
counter-clockwise to loosen until it has completely disengaged from
the threads of the valve body (see Fig. 5). Carefully lift out the plug,
along with the spring(13) and HP valve(12).
12. Separate the spring and HP valve from the HP balance plug. Discard
the HP valve, and closely examine the spring with the use of a magni-
fier to check for any signs of pitting, rusting, or other corrosion that
permeates the surface of the metal. Set the spring aside if it is found
to be in reusable condition, or replace with new as needed.
13. Remove and discard both of the static O-rings(15&16) from the HP
balance plug, and also the small dynamic O-ring(14) that is held in-
side the opening.
Use only a brass or plastic O-ring tool when removing O-rings from the
HP balance plug. Use of a sharp steel instrument can easily scratch the
O-ring sealing surface, which will result in a permanent leak that will
require replacement of the part.
14. Reposition the valve body inside the vice and secure it with the con-
nector (Yoke or DIN) facing straight up.
Before proceeding, determine whether the first stage is config-
ured with a DIN or yoke connection, and refer to the appropri-
ate disassembly procedure provided below.
15. DISASSEMBLY OF YOKE CONNECTOR
A. Remove the yoke clamp screw(27) from the yoke clamp(24) and
remove the protective cap(25). Examine the condition of the spare
O-ring(26) and replace as needed.
B. Apply a w" box wrench to the yoke clamp connector(30). Using
firm, steady force, turn the connector counter-clockwise to loosen
and remove from the valve body and yoke clamp (see Fig. 6).
Lift the connector and clamp straight off the valve body. Sepa-
rate these items, and set the clamp aside.
It is important that the wrench is securely seated over the entire hex
surface of the yoke clamp connector to prevent any damage to the part.
Do not use impact to loosen.
NOTE