8
PI-190
June 2019
3. Use only nozzles with a manufacturer’s pressure rating of at least the
operating pressure or a burst rating or no less than 3.0 times the desired
operating pressure.
4. Prior to installation, make sure the nozzle has no clogged orifices.
5. Apply 3 - 4 wraps of Teflon tape to male connection threads on the
nozzle. Apply anti-seize compound over the sealant tape for additional
protection against galling in connection threads. Wrench connection 1
1/2 - 2 turns past hand tight. A minimal thread engagement of four (4)
threads should exist on all Jetstream NPT pipe connections.
6.
CAUTION
Use wrench flats (when available) or a properly adjusted
smooth jaw plier wrench (JS PN 64119) to tighten nozzle. Avoid using
pipe wrench as wrench marks will cause nozzles to crack and fail.
7. Blocked orifice(s) can cause excessive system pressure and failure. If
orifice(s) appear clogged or partially blocked with dirt or debris, remove
nozzle from J-Force and clean immediately.
8.
Remove nozzle from service if:
A. Nozzle is split or damaged;
B. Nozzle sidewall is worn by more than 25% at any point;
C. Nozzle’s ability to hold pressure is questionable
D. Threads are missing or damaged
FLEXIBLE TUBE CLEANING LANCES
1.
Read General Safety
section and Nozzle Safety Warnings prior to
connecting flex lances.
2.
Do not
use a flex lance with a burst rating less than 2.25 times the
pressure at which it will operate. 10,000 psi operating pressure flex
lances
must
have a
minimum
22,000 psi burst rating. 8,000 psi operat-
ing pressure flex lances
must
have a
minimum
18,000 psi burst rating.
3.
Do not
use a flex lance that has an unknown burst or unknown
manufacturer’s operating pressure rating.
4.
Never use a lance which is kinked, worn, frayed
or whose abilities
to hold pressure is questionable.
5.
Do not
use a lance which has damaged or missing threads.
6.
Clearance
between lance and tube deposits
must be sufficient
to
allow unrestricted backflow of water and debris. With tubes containing
hard deposits this clearance should be 1/8”
minimum
on the diameter
(or 1/16” per side) of the lance. With tubes containing soft, pliable
deposits this clearance should be greater.
Insufficient side clearance
may cause lance to blow back toward operator
.
