Page 307 - ParkerBrassCatalog2010

Parker Hannifn Corporation
Parker Brass Products Division
Otsego, Michigan
K21
K
Brass Ball Valves Series 520
Advantages
Parker’s forged body ball valve provides extended service life and
resists failure caused by severe temperature applications. Full fow
design assures maximum system effciency. Highly inert PTFE seats
provide resistance to chemical corrosion. Two Fluorocarbon o-rings at
the stem provide maximum safety with no maintence. The blow-out
proof stem, chrome plated brass ball and a specially designed handle
enable increased turning leverage for ease of opening and closing.
Parker’s ball valve can be readily identifed, assuring high quality
engineering and reliability. This economical ball valve is available in
female pipe sizes.
Applications
Parker’s industrial ball valve product line is intended for general
purpose use. Please be aware that ball valves are intended for use in
the fully open or closed positions. Depending on application conditions,
throttling of the valve may result in premature seal failure and/or
inability to turn the valve handle.
For use as shutoffs for highway, off highway, and construction
equipment vehicles.Water and air service lines on capital equipment
and plant design plumbing that require total shutoff capability.
Working Pressure and Temperature
Saturated steam service up to 150 PSI and 350° F
Vacuum, 29 Inches of Mercury
elytS epyT lairetaM eziS
V 025 P 4-
elytS evlaV-V
epyT stroPTPNelameF/elameF-025
lairetaM ssarB-P
eziS
"4/1-4
"8/3-6
"2/1-8
"4/3-21
"1-61
"4/11-02
"2/11-42
"2-23
snoitpO eldnaHeeT-40
600
50 0 100 150 200 250 300 350
450
300
150
0
TeMPeRATURe ( °F)
PReSSURe (PSI)
2-1/2"-3"
1/4"-2"
Operating Instructions
Quarter turn is “ON” or “OFF”.
(Provides positive stop action for full shutoff.)
U.L. Listed
U.L. Category:
YSDT LP-Gas Shut-off Valves
YRBX Flammable Liquid Shut-off Valves
YRPV Gas Shut-off Valves
YQNZ Compressed Gas Shut-off Valves