Flowserve 818 Series - Manual

Worcester Controls
WCAIM2020
(Part 13458)
818/828 Series 150# and 300# Flanged
2" - 8" Two-Piece Ball Valves
Installation, Operation and Maintenance Instructions
CAUTION: Flowserve recommends that all product which must be
stored prior to installation be stored indoors, in an environment
suitable for human occupancy. Do not store product in areas where
exposure to relative humidity above 85%, acid or alkali fumes,
radiation above normal background, ultraviolet light, or
temperatures above 120°F or below 40°F may occur. Do not store
within 50 feet of any source of ozone.
A. INSTALLATION
1. Standard valves may be installed for flow or vacuum in either
direction. Valves with upstream relief hole in ball (V3 option) are
one-way valves. Use care to exclude pipe sealants from the valve
cavity.
2. When installing, use standard gaskets suitable for the specific
service. Tighten flange bolts or studs evenly. Follow ANSI
standards for flange bolt torques.
B. OPERATION
1. The operation consists of turning the handle and/or stem 1 /
4
turn
clockwise to close, and 1 /
4
turn counterclockwise to open. The stop
plate has a pointer, and when it points and/or the stem groove
and flats are in line with the pipeline, the valve is open. These
valves may also be automated.
2. These valves will provide bubble-tight shutoff when used in
accordance with Worcester’s published Pressure-Temperature
Chart.
3. It is not good practice to leave a ball valve partly open (throttling
operation) without knowledge of the pressure drop and flow at
that position. These conditions should be checked with
Worcester’s Control Valve Brochure.
4. As shipped from the factory, valves (except oxygen prepared V20,
V33 or prefix code “X”, and valves with V38 or V46 options)
contain a silicone-based lubricant. This is for break-in purposes
and may be removed, if it is objectionable for a particular
application, by disassembling and solvent washing. Lacquer
thinner will remove the lubricant.
5. Media which can solidify, crystallize or polymerize should not be
allowed to stand in ball valve cavities.
6. Torque Requirements: Operating torque requirements will vary
depending on the length of time between cycles, line pressure,
type of valve seats, and the media in the system. For a detailed
analysis of valve torque requirements, see Worcester’s Actuator
Sizing Manual.
NOTE: Media which contain fine powders (25 microns or less)
will significantly raise ball valve torque requirements.
CAUTION: The fluoropolymer body seal (T) and the graphite
body seal (Z) make excellent seals. However, some points of
caution in their use need emphasizing.
7. a. No fluoropolymer part (except seats) is reusable. Graphite
body seals are also not reusable. Upon disassembly of the
valve, they should be discarded and replaced with new parts.
b. Care must be taken to avoid scratching the fluoropolymer
during installation. Light lubrication of these seals can help to
prevent damage.
C. MAINTENANCE
If seepage is noted at stem, tighten retaining nut 1 /
6
turn at a time until
seepage stops. Caution: For maximum stem seal life, proper stem
adjustment procedure must be followed. Excessive tightening causes
higher torque and shorter stem seal life.