Watts LFB6801 - Manual (Page 2)

Rebuilding
Most standard bidirectional ball valves available on the market to-
day, regardless of manufacturer, can trap fluids in the valve cavity
when closed. If your Watts ball valve has been used to conduct
hazardous media, the following steps should be taken prior to
removal from line and disassembly.
1. Relieve line pressure.
2. Place the valve in a half-open position and flush the line to
remove hazardous material from the cavity. The valve can now
be removed from the line.
Always advise maintenance personnel when they are maintaining
or rebuilding a valve that has been conducting hazardous mate-
rial. Proper protective clothing and eye protection should always
be utilized.
3. To replace seats and seals:
a. For the LFB6800 series, remove 1 top bolt, loosen other 3
body bolts, slide body center section out.
b. Once the center section has been removed, close the valve
and remove the seats, ball and body seals.
If condition of the ball surface allows for its reuse, be careful
to handle and store the ball in such a manner so as to
prevent subsequent damage to the ball’s critical surfaces.
c. Remove valve handle nut, handle, gland packing nut and
remove the valve stem through the body cavity.
d. Remove the stem thrust-washer from the stem or the valve
body cavity, if the washer did not come free from the cavity
with the stem. Remove stem seal.
e. Examine all metallic sealing surfaces such as ball, stem
shank and pipe-ends for damage such as scratches or
nicks. In some cases, slight scratches across the sealing
surface of pipe ends can be removed using a light emery
cloth. If pipe end damage is excessive, the valve must be
replaced. If the ball or stem is excessively damaged, ball
and stem kits can be ordered. Consult your Watts agent.
f. Having assured that all critical surfaces have been inspected,
cleaned and/or replaced, reassembly can begin.
g. Place new thrust-washer on stem and install stem through
body cavity. Place new stem seal in position. Reinstall
gland nut and tighten to the torque listed on Table 2.
h. Lightly lubricate seats and body seals using a lubricant that
is compatible for the service media.
I. Reinstall ball, seats and body seals.
j. Reinstall center section between pipe-ends and retighten
bolts in torquing sequence shown to the values listed on
Table 1.
k. Reinstall handle and secure with handle nut.
Torque Sequence
1 4
2 3
▼
Series LFB6800
Packing Nut Torques
Valve Size Torque (in.-lbs.)
1 ⁄
4
", 3 ⁄
8
", 1 ⁄
2
" 25-60
3 ⁄
4
" 30-60
1" 180-300
1 1 ⁄
4
" 200-300
2" 300-350
Limited Warranty: Watts Regulator Co. (the “Company”) warrants each product to be free from defects in material and work-
manship under normal usage for a period of one year from the date of original shipment. In the event of such defects within
the warranty period, the Company will, at its option, replace or recondition the product without charge.
THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH
RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY
HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of
warranty, and the Company shall not be responsible for any incidental, special or consequential damages, including without
limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work prop-
erly, other costs resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from
adverse water conditions, chemical, or any other circumstances over which the Company has no control. This warranty shall
be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.
Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or
limitation of incidental or consequential damages. Therefore the above limitations may not apply to you. This Limited Warranty
gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state
laws to determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES
THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.
WARNING !
WARNING: This product contains chemicals known to the
State of California to cause cancer and birth defects or other
reproductive harm.
For more information: www.watts.com/prop65
NOTICE
IS-B6800 1323 EDP# 1910641 © 2013 Watts
USA: Tel: (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com
Canada: Tel: (905) 332-4090 • Fax: (905) 332-7068 • www.wattscanada.ca
A Watts Water Technologies Company
NOTICE
TABLE 2