Aintenance – Jordan Valve Mark D & DA Series Globe & Angle Control Valve User Manual
Page 2
M
ark
D
anD
Da S
erieS
G
lobe
anD
a
nGle
S
tyle
C
ontrol
V
alVeS
-2-
M
aIntenance
Warning
Personal injury may result from sudden re
lease of any process pressure. Jordan Valve
recommends the use of protective clothing,
gloves and eye wear when performing
any installation or maintenance.
Isolate the valve from the system and relieve
pressure prior to performing maintenance.
Disconnect any operating lines providing air
pressure, control signals or electrical power
to the actuator.
Install bypass valves or completely shut
down the process to isolate the valve
from process pressure. Relieve all pressure
and drain process media from both sides of
valve.
Vent all pressure from the actuator and re
lieve pre-compression from actuator spring.
Use lock out procedures to ensure the pro
cess remains shut down during maintenance.
Check the packing box for pressurized pro
cess fluids even after the valve has been
removed from the pipeline, particularly when
removing packing hardware or packing rings,
or removing packing box pipe plug.
Depending on the severity of service, valve body
parts experience wear and tear and must be inspect-
ed and maintained according to conditions.
This manual includes instructions for lubrication and
maintenance of packing, trim maintenance and lap-
ping of seating surfaces. All maintenance procedures
can be conducted while the valve remains in the line.
Note
If a gasket seal is disturbed while
removing or adjusting gasketed parts,
Jordan Valve recommends installing a new
gasket while reassembling. A proper seal
is required to ensure optimum operation.
Valve Rating
Stem Diameter
Minimum Recommended
Torque
Maximum Recommended
Torque
mm
in
N•m
Lbf•in
N•m
Lbf•in
3600 or to
Class 1500
9.5
0.375
4
36
5
48
12.7
0.5
7
66
11
96
19.1
0.75
16
144
24
216
6000 or Class
2500
9.5
0.375
5
42
7
60
12.7
0.5
9
78
12
108
19.1
0.75
20
180
30
264
9000 psi
12.7
0.5
6
54
8
264
19.1
0.75
20
180
30
264
10,000 psi
12.7
0.5
6
54
8
72
19.1
0.75
20
180
30
264
Table 1: Bolting Torque for Packing Box Nuts (Key 2)