Fisher D450003T012 用户手册

Type N201

Note

If propane vapor pressure is used, atmospheric

or room temperature below 8°F (-13,3°C) will

limit supply pressure to below 30 psig (2,1 bar).

To assure tight shutoff of the ﬁller valve in this

event, refer to the table below.

MINIMUM SUPPLY

PRESSURE, PSIG (bar)

MAXIMUM RECOMMENDED

PUMP DISCHARGE, PSIG (bar)

21 (1,4)

200 (13,8)

19 (1,3)

150 (10,3)

17 (1,2)

100 (6,9)

14 (0,97)

50 (3,4)

13 (0,90)

25 (1,7)

5. Attach the propane ﬁlling hose to one of the ﬁller valve

outlets. Plug the other outlet. The ﬁlling hose must be

complete with a shutoff valve and suitable cylinder valve

connection. The ﬁlling hose and shutoff valve can be
counterbalanced for easy handling if desired.

Operation

  1.  Place cylinder on scale platform and connect ﬁller hose.
  2.  Slide beam weight “H” to tare weight stamped on cylinder.
  3.  Balance scales to compensate for the weight added by

the ﬁller hose and shutoff valve. On some scales this can be

done by means of a small weight near the beam pivot pin. On

others a suitable weight can be added to scale pan “F”.
4. Add a 100 pounds (45,4 kg) weight (or the net weight

desired) to scale pan “F”, and open the cylinder and hose

valve for trial automatic ﬁlling operation.

5. Proceed with ﬁlling operation until scale beam rises and

contacts the trip valve stem. The ﬁller valve will close and

the ﬁlling operation is complete. This is indicated by the red

button on top of the ﬁller valve. Close the hose shutoff valve

and the cylinder valve.

6. Check weight of full cylinder on another scale. Balance

weight or the weight in scale pan “F” may have to be

readjusted slightly until the correct cylinder weight is

obtained. Filling accuracy is largely dependent upon the

condition of the scale used with Type N201.
7. After the scales have been checked and adjusted, simply

position the empty cylinder on the scale, connect the ﬁlling

hose, slide beam weight “H” to the tare weight stamped on

the cylinder, open the hose shutoff valve and the cylinder

valve, and the N201 will ﬁll the cylinder to the weight added
on the scale pan.

Note

When operating with high pump pressure,

the ﬁller valve may close off, then reopen

for a short spurt and close off again. This

is due to the force of

the incoming liquid

stream. If the proper cylinder weight has

been obtained before the additional spurt,

the operator should immediately close the

hose shutoff valve when the scale beam

contacts the trip valve stem. If the scales

are balanced after the additional spurt, the

operator should wait for this before closing

the hose shutoff valve.

In Case of Trouble

1. If sticking of the main (upper) valve should occur, place a

few drops of oil below the disc holder, Key No.5 in Figure 3.

This can be done with an eye dropper or oil can through one

of the outlet ports. Refer to the disassembly instructions if this

does not correct the situation.

2. If the disc holder wears out quickly, check the outlet

pressure of regulator no. 2. Too high a regulator setting will

cause the disc to fail. Refer to step 4 under “Installation”.
3. If the trip valve stem “B” should stick, remove the lower

trip valve body, and clean out all oil or grease. Polish the

seat in the trip valve body by rotating the eraser end of a
pencil against the seat 10 or 12 times.

Disassembly

To check disc holder assembly, O-ring, and diaphragms

proceed as follows (numbers in parenthesis refer to Key Nos.

in Figure 3):

1. Remove tubing connection from the angle adaptor in

Type 67/683 (key 30).

2. Mark the valve body (key 17), valve housing (key 2),

and valve head (key 1) so that they can be aligned easily

when reassembling.

3. Remove cap screws (key 22).
4. Separate the valve head (key 1), valve housing (key 2), and

valve body (key 17). Examine the upper and lower diaphragms

(keys 10 and 32). Replace if necessary.
5. Remove oriﬁce (key 3) and unscrew the disc holder

assembly (key 5). Examine and replace if necessary.
6. Remove bushing (key 8) and take out the O-ring (key 7).

Examine and replace if necessary. Put Dow Corning #3 grease

(or equivalent) on the O-ring.

7. Make sure all parts are clean before reassembling.

To reassemble

1. Replace oriﬁce (key 3) in valve head (key 1).

2. Replace O-ring (key 7) and screw in bushing (key 8).
3. Replace disc holder assembly (key 5) and

spring (key 21). Screw the disc holder into the diaphragm

head (key 9).

4. Replace upper diaphragm (key 10) on the valve head

(key 1). Align the valve housing (key 2), spring (key 35),

lower diaphragm assembly (key 32), and valve body (key 17)

so that the cap screws (key 22) can be inserted.

5. Connect tubing (key 39) to angle adaptor in Type 67/683
(key 30).