Hayward NVA User Manual
NVA Series
Needle Valves
1/4˝ TO 1/2˝ PVC AND GFPP
KEY FEATURES
• Available in PVC and GFPP
• Integrated Stem/PTFE Seat Design
• Flanges for Panel Mounting
• NPT Threaded Ends
• Accurate Flow Control
• Fine Pitch Stem Threads for
Precise Adjustment
• Adjust Flow Rates Down
to Drops per Minute
• Ideal for Metering Flow
MATERIALS
• Heavy Duty FPM O-Ring Seals
• PVC Cell Class 12454 per ASTM D1784
• GFPP per ASTM D4101
*
FLOW CONTROL VALVES
TECHNICAL INFORMATION
EXPLODED VIEW
SELECTION CHART
SIZE
1/4˝ – 1/2˝
(DN8 – DN15)
MATERIAL
PVC or GFPP Threaded FPM
* Patent Pending
END
CONNECTION
SEALS
PRESSURE
RATING
150 PSI @ 70°F
Non-Shock
WWW.HAYWARDFLOWCONTROL.COM • 1.888.429.4635
53
60 80 100 120 140 160 180 200 220 240 260
WORKING PRESSURE (PSI)
TEMPERATURE ºF
160
140
120
100
80
60
40
20
0
NVA Series
Needle Valves
1/4˝ TO 1/2˝ PVC AND GFPP
TECHNICAL INFORMATION, CONTINUED
PARTS LIST
1. Body
2. Thumb Wheel
3. Bonnet
4. O-Ring
5. Stem
6. Seat
7. Bezel
I
H
J
K
G
NPT
1/4˝, 3/8˝ or 1/2˝
DIMENSIONS
NOM SIZE
in/DN
A
in/mm
B
in/mm
C
in/mm
D
in/mm
E
in/mm
F
in/mm
G
in/mm
H
in/mm
I
in/mm
J
in/mm
K
in/mm
1/4/8 2.50/64 1.12/28 1.49/38 2.49/63 1.04/26 1.20/30 .97/25 1.60/41 .22/6 2.12/54 .30/8 .22/.10
3/8/10 2.50/64 1.12/28 1.49/38 2.49/63 1.04/26 1.20/30 .97/25 1.60/41 .22/6 2.12/54 .30/8 .22/.10
1/2/15 2.50/64 1.12/28 1.49/38 2.49/63 1.04/26 1.20/30 .97/25 1.60/41 .22/6 2.12/54 .30/8 .22/.10
Dimensions are subject to change without notice – consult factory for installation information
Cv VALUES
SIZE
in/DN
1/4/8 .64
3/8/10 .72
Cv VALUES
PRESSURE LOSS
CALCULATION FORMULA
2
Q
∆P =
]
[
Cv
∆P = Pressure Drop
Q = Flow in GPM
Cv = Flow Coefficient
OPERATING TEMPERATURE/PRESSURE
WEIGHT
lbs/kg
54
1/2/15 .79
Hayward is a registered trademark
of Hayward Industries, Inc.
© 2015 Hayward Industries, Inc.
Contact Hayward Flow Control with questions: USA: 1-888-429-4635 • Fax: 1-888-778-8410 • One Hayward Industrial Drive • Clemmons, NC 27012 USA
Canada: 1.888.238.7665 • Fax: 1.905.829.3636 • 2880 Plymouth Drive • Oakville, ON L6H 5R4 Canada • Email: hflowcanada@haywardnet.com
Visit us at: www.haywardflowcontrol.com • E-mail: hflow@haywardnet.com
Loading...