Dresser Masoneilan 4700E, Instructions Manual

Instruction ES2007 4/98
Models 4700P and 4700E

22

Field Mounting and Complete
Calibration Reciprocating Valves
using 87/88 Actuators

Define valve action and positioner action. (4700E is direct
action only) If lever S/A (3) is not on proper side (Left or
Right) as determined from data on pages 27-29, change to
correct position. Refer to “Changing lever S/A Orientation”
section. If positioner is not on valve refer to Figures 4-10 for
mounting and linkage connection procedures. If positioner
is reverse acting (4700P only) do not assemble cam to
shaft at this time. Make pneumatic connections per
Figure 11 for action desired (4700P), or electrical and
pneumatic connections for 4700E (direct action only)
Proceed to proper section below.

Air to Open/Direct Acting Positioner (Figure 19 & 20)

1.

Apply lower value of instrument signal. (i.e. 3 psi if
3-15 psi 4700P or 4 mA if 4-20 mA 4700E)

2.

Unlock zero locknut (4C) and turnbuckle locknut
(107). Adjust zero by turning both the zero nut (4B)
and turnbuckle (106) until the low signal line of the
cam is aligned with the positioner case raised refer-
ence line and the travel indicator shows “closed”
position. Refer to Figures 4 and 19. Retighten both
locknuts.

3.

Apply full scale value of instrument signal (i.e. 15 psi
or 20 mA.) and note position of travel indicator. If
travel is not correct, perform span adjustment. (Refer
to “Span Adjustment” section)

4.

Repeat zero and span adjustments per “Zero Adjust-
ment” and “Span Adjustment” sections until travel
range is correct. After adjustments are satisfactory,
retighten the spring locking screw (8), zero locknut
(4C), and turnbuckle locknut (107).

Air to Open/Reverse Acting Positioner (4700P only)
(Figure 19)

1.

Disconnect air line from positioner to actuator at
actuator. Run an independent regulated air line to the
actuator. Slowly apply proper air pressure through
the regulator to open the valve. (Handwheel may be
used to open valve instead of regulated air line.) Align
the travel indicator with the “open” end of travel scale.
Do not overtravel.

2.

Place cam (26) on to cam shaft with selected
cam lobe facing forward and low signal line approxi-
mately aligned with positioner case raised reference
line. Secure cam to shaft using washer (27) and
screw (28).

3.

Slowly reduce pressure applied to actuator to zero (If
handwheel was used, back if off fully). Cam will now
be at high signal line.

4.

Disconnect the independent regulated air line and
connect the positioner output line to the actuator.
Connect supply pressure and signal to the positioner.

5.

Apply low value of instrument signal. (3 psi if 3-15 psi
signal range) Unlock zero locknut (4C) and turn-
buckle locknut (107). Adjust zero by turning both
the zero nut (4B) and turnbuckle (106) until the low
signal line of the cam is aligned with the positioner
case raised reference line and the travel indicator
shows “opened” position. Refer to Figures 4 and 19.
Retighten both locknuts.

6.

Apply full scale value of instrument signal (i.e. 15 psi)
and note position of stroke scale indicator. If travel is
not correct, perform span adjustment. (Refer to “Span
Adjustment” section)

7.

Repeat zero and span adjustments per “Zero
Adjustment” and “Span Adjustment” sections until
travel range is correct. After adjustments are
satisfactory, retighten the spring locking screw (8),
zero locknut (4C), and turnbuckle locknut (107).

Air to Close/Direct Acting Positioner (Figure 19 & 20)

1.

Apply lower value of instrument signal. (i.e. 3 psi if
3-15 psi 4700P or 4 mA if 4-20 mA 4700E)

2.

Unlock zero locknut (4C) and turnbuckle locknut
(107). Adjust zero by turning both the zero nut (4B)
and turnbuckle (106) until the low signal line of
the cam is aligned with the positioner case raised
reference line and the travel indicator shows “opened”
position. Refer to Figures 4 and 19. Retighten both
locknuts.

3.

Apply full scale value of instrument signal (i.e. 15 psi
or 20 mA.) and note position of travel indicator. If
travel is not correct, perform span adjustment. (Refer
to “Span Adjustment” section)

4.

Repeat zero and span adjustments per “Zero Adjust-
ment” and “Span Adjustment” sections until travel
range is correct. After adjustments are satisfactory,
retighten the spring locking screw (8), zero locknut
(4C), and turnbuckle locknut (107).

Air to Close/Reverse Acting Positioner (4700P only)
(Figure 19)

1.

Disconnect air line from positioner to actuator at
actuator. Run an independent regulated air line to the
actuator. Slowly apply proper air pressure through
the regulator to close the valve. (Handwheel may be
used to open valve instead of regulated air line.) Align
the travel indicator with the “closed” end of travel
scale. Do not overtravel.

2.

Place cam (26) on to cam shaft with selected
cam lobe facing forward and low signal line