Maintenance And Service - OTC 4277 Manuel De L'utilisateur

Replacement of burst discs (No. 573736)
Normal Flow
Direction
Reverse
Flow
Direction
1. Remove burst disc cartridge with a 1-3/8" AF spanner.
2. Remove the internal disc holder in the cartridge with 1-1/16" AF spanner.
3. Remove the two spent discs and fit new discs, one on each side of the spacer.
4. Tighten disc holder to 40 lb. ft. (55 Nm).
5. Check the seals.
6. Replace the entire cartridge assembly in the valve body.
Calibration
Flow measurement equipment, such as flow meters and flow blocks, should be calibrated
annually or after every 2,000 hours of use. Calibrate the equipment more frequently if it is used
or stored in environments where the equipment is exposed to dust or vibrations.
4

Maintenance and service

N
S
Pressure Control Valve
1
1) 1-3/8" AF
2) 1-1/16" AF
3)
4) 40 lb. ft. (55 Nm).
5)
6) 1-3/8" AF
2 Burst Discs
(Max. 6000 psi / 420 bar)
S
N
2;4
3
5
1;6
Normal Flow
Direction
Reverse
Flow
Direction
Spacer
Burst Disc
Cartridge