Ametek Magnetrol Tuffy Manuale d'installazione e d'uso - Pagina 4
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Safety
check
valve
1/4" NPT
inlet (B)
1/4" NPT
outlet (C)
1/4" NPT
inlet (A)
Figure 2
4
1.3
1.3.1 Mounting an NPT Tuffy
1. Apply either Teflon
2. Engage the 2" NPT by hand to avoid damaging threads.
3. Using a pipe wrench, rotate the unit clockwise until threads
Caution: The pneumatic Tuffy must be installed with the serial
1.3.2 Mounting a Tuffy with Flange
1. Have proper flange bolting and gasket on hand.
2. Carefully align mounting flange with the vessel mounting
3. Ensure that the flange gasket is seated properly. Install
4. Tighten alternating flange bolts in a star pattern.
5. Install Tuffy into 2" NPT of mounting flange as described
Caution: Operation of all buoyancy type level devices should be done
1.3.3 Mounting External Cage Tuffy
Shut–off
valve
1. Install cage so that tappings are within 3° of vertical in all
Pressure
2. Mount cage as close to vessel as possible, to provide more
vessel
C L
Switch
Shut–off
actuation
valve
3. Use pipe of sufficient size and strength to support the
level
Drain valve
4. All piping should be straight and free of low spots or pockets.
5. Shut-off valves are recommended for installation between
6. Once external cage is mounted, install pneumatic Tuffy into
Mounting
The pneumatic Tuffy
Liquid Level Switch is available with a
®
2" NPT mounting bushing, a variety of flange mountings
and external cages for mounting outside of the vessel.
tape or Petrolatum to the mounting
®
threads to prevent galling.
are tight in mounting. Ensure that the serial number plate is
on top. See Figure 1.
number plate on top to ensure correct switching action.
flange.
flange bolts and nuts.
in Section 1.3.1 above.
in such a way as to minimize the action of dynamic forces on
the float or displacer sensing element. Good practice for
reducing the likelihood of damage to the control is to equal-
ize pressure across the device very slowly.
A typical Tuffy
external cage installation is shown in Figure 2.
®
directions. Check installation with a level.
accurate level in cage. Long pipe runs may result in cooler,
denser liquid than that in the vessel and cause inaccurate
level in the Tuffy cage.
control. If necessary, provide a hanger or stand to help
support the weight of the cage.
Lower liquid line should drain toward vessel and upper line
toward Tuffy cage.
the vessel and the cage assembly.
cage per Section 1.3.1 or 1.3.2.
Tuffy Liquid Level Control with Pneumatic Switch
®