Emerson NZ Series - Page 15

NZ/NZ-M and NZOS/NZOS-M Series
15
Table 4. NZ Main Valve Torque Specications
PART NAME
NZ/NZ-M SERIES MAIN VALVE TORQUE SPECIFICATIONS (N•m)
DN 25 / NPS 1 DN 50 / NPS 2 DN 80 / NPS 3 DN 100 / NPS 4 DN 150 / NPS 6
Diameter Torque Diameter Torque Diameter Torque Diameter Torque Diameter Torque
Bolt (15) for
CL150 and 300
M12 50 to 60 M12 50 to 60 M16 90 to 110 M16 90 to 110 M20 190 to 220
Bolt (15) for
CL600
M20 160 to 200 M20 160 to 200 M24 300 to 330 M24 300 to 330 M30 550 to 600
Bolt (30) M12 50 to 60 M12 50 to 60 M16 90 to 110 M16 90 to 110 M24 300 to 330
Nut (34) for
CL150 and 300
M14 55 to 65 M12 50 to 60 M16 90 to 110 M20 160 to 200 M24 300 to 330
Nut (34) for
CL600
9/16-12 60 to 70 1/2-13 55 to 65 5/8-11 100 to 130 3/4-10 190 to 210 1-8UNC 310 to 340
Bolt (129) M8 15 to 22 M8 15 to 22 M10 20 to 30 M10 20 to 30 M10 20 to 30
Note: All torque values are for parts that have been lubricated.
Table 5. JP Series Pilot Torque Specications
PART NUMBER
JP SERIES PILOT TORQUE SPECIFICATIONS (N•m)
Sleeve (key 47) Bolt (key 60) Bolt (key 61) Nut (key 62) Nut (key 63)
Diameter M16 M10 M10 M6 M8
Torque 7 to 8 28 to 32 28 to 32 3 to 4 6 to 8
Note: All torque values are for parts that have been lubricated.
Table 6. Failure Mode Analysis
PART NAME CONDITION CAUSE EFFECT
NZ/NZ-M SERIES
REACTION MODE
Pilot Filter Blocked / Clogged
Debris or aromatics present in
the gas
Decrease of loading pressure Close
Pilot disk Worn or damaged
Debris or aromatics present,
Sour gas
Increase loading pressure Open
JPLO/JPHO Series
Second Stange Diaphragm
Worn or Damaged
Debris or aromatics present,
Sour gas
Increase loading pressure Open
JPLC/JPHC Series
Second Stange Diaphragm
Worn or Damaged
Debris or aromatics present,
Sour gas
Decrease loading pressure Close
Main valve diaphragm Worn or damaged
Debris or aromatics present,
Sour gas
Loading pressure leakage to
downstream
Close
Pilot First stage Frozen
Moisture in the gas, high
pressure drop
Decrease of loading pressure Close