User's Manual

4. Open the isolation valve and insert the drill

through the valve and cut the sensor clearance

hole. After the hole is cut, withdraw the drill from

the isolation valve and close the valve. Remove

the drilling machine per manufacturer's instructions.

5. Install brass sensor nut/bleed valve into the top

of the isolation valve. Make sure the bleed valve

clears the handle of the isolation valve during

operation.

3.5 Calculating the H Dimension

Before installing the sensor some critical dimen-

sions must be established. The rotor shaft must be

located 10% inside the pipe I.D. to insure accurate

calibration capability. To accomplish this, the "H"

dimension is measured from the outside surface of

the pipe to the bottom of the sensor flange.

Nominal "H" dimensions for standard pipes are

listed on page 18-19. For irregular pipe dimen-

sions, calculate the "H" dimension using the given

formulas (page 7). The 6 inch ruler may be used

to measure the I.D. and wall thickness of pipes up

to 5 inch (standard sensors only).

For standard sensor installa-

tions, the ruler may be used to

measure wall thickness and

I.D. of pipes up to 5 inches in

diameter.

Wall

thickness:____________

I.D.: ________________

For Hot-Tap installations, we

assume pipe dimensions are

known

I.D.

wall

thickness

incorrect

correct

process pipe

brass sensor nut

bleed valve

make sure

bleed valve

clears isolation

valve handle