Brochure

Thermoplastic Valves Product Guide & Engineering Specifictions
Needle Valves
Page 767 Suitable for Oil-Free air handling to 25 psi, not for distribution of compressed air or gas Spears
®
Manufacturing Company
Due to Material Cost Variations, Prices Sub
j
ect to Chan
g
e. Check On-line Catalo
g@
www.spearsmf
g
.com
Features – PVC, CPVC & PP
Needle Valves provide proportional opening to needle travel
for more accurate metering applications and other fine
adjustment flow control applications. Special design PTFE
seal eliminates elastomer type seals or O-rings that can
contribute to chemical compatibility problems. PVC, CPVC
and Polypropylene valves are available with 1/4", 3/8" and
1/2" NPT female threaded ends in either standard Globe
Pattern or special Angle Pattern configuration that eliminates
need for additional elbow in various system setups.
• Chemical & Corrosion Resistant PVC, CPVC or PP
Construction
• Precision Metering Chamber
• Globe & Angle Body Configurations
• Removable Bonnet For Easy Disassembly & Cleaning
• Solid PTFE Stem Seal - No Elastomer Seal or Lubricants
Used
• Built-in Panel or Bracket Mounting Nut
• Easy-Grip Polypropylene Handle
• PVC & CPVC Pressure Rated to 235 psi @ 73°F
Polypropylene Pressure Rated to 150 psi @ 73°F
Quick-View Needle Valve Selection Chart
Temperature Pressure Rating
Cv Values
Gallons per minute at 1 psi pressure drop.
Size Globe Pattern Angle Pattern
1/4" - 3/8" .310 .426
1/2"
.62 .78
System Operating
Temperature °F (°C)
100
(38)
110
(43)
120
(49)
130
(54)
140
(60)
150
(66)
160
(71)
170
(77)
180
(82)
190
(88)
200
(93)
210
(99)
Valve
Pressure
Rating
psi
(MPa)
1/4"-1/2"
PVC
235
(1.62)
211
(1.45)
150
(1.03)
75
(.52)
50
(.34)
-0-
(-0-)
-0-
(-0-)
-0-
(-0-)
-0-
(-0-)
-0-
(-0-)
-0-
(-0-)
-0-
(-0-)
CPVC
235
(1.62)
219
(1.51)
170
(1.17)
145
(1.00)
130
(.90)
110
(.76)
90
(.62)
80
(.55)
70
(.48)
60
(.41)
50
(.34)
-0-
(-0-)
PP 150 105 90 80 65 50 45 30 20 -0- -0- -0-
Valve
Size
PVC Part Numbers
1,2
Pressure Rating
Globe Pattern Angle Pattern
Socket SR Threaded Threaded Socket SR Threaded Threaded
1/4" 5592-002 N/A 5591-002 5692-002 N/A 5691-002
PVC & CPVC 235 psi,
PP 150 psi Non-Shock
Water @ 73°F
3/8" 5592-003 5591-003SR 5591-003 5692-003 N/A 5691-003
1/2" 5592-005 5591-005SR 5591-005 5692-005 5691-005SR 5691-005
1: For CPVC Valve, add the letter “C” to the part number (e.g. 5591-002C)
2: For threaded Polypropylene Valve, add the letter “P” to the part number (e.g. 5591-002P, 5591-005PSR)
Sample Engineering Specification
All thermoplastic Needle Valves shall be constructed
from PVC, ASTM D 1784 Cell Classification 12454, CPVC,
ASTM D 1784 Cell Classification 23447, or Polypropylene,
ASTM D 4101. All valves shall be globe pattern or angle
pattern body configuration with 1/4", 3/8" or 1/2" female
NPT end connections. All valves shall have removable
bonnet cap with replaceable PTFE seal. No elastomer
seals shall be used. All valves shall have built-in panel
mounting nut and high impact polypropylene handles. All
PVC and CPVC valves shall be pressure rated to 235 psi
and all Polypropylene valves to 150 psi for water @ 73°F, as
manufactured by Spears
®
Manufacturing Company.