Instructions / Assembly

Engineering Specification
ES-LF53_LF530C
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Pressure Relief Valves
(Calibrated and non-Calibrated)
Sizes: LF53:
1
⁄2" or
3
⁄4"
LF530C:
1
⁄2" or
3
⁄4"
Watts Series LF53 and LF530C Pressure Relief Valves are spring
operated Lead Free* brass relief valves designed to be used only
as protection from the build up of excessive pressure in systems
containing water, oil or air. These valves are not ASME approved
safety relief valves and should not be used in system applications
with this requirement. They feature a Lead Free* brass construc-
tion with stainless steel springs. Ideally suited as a bypass ther-
mal expansion relief valve, the Series LF530C valves incorporate
a calibrated adjustment feature for setting the valve to the relief
pressure required. Its adjustable pressure range is 50-175psi
(3.4-12.1 bar). Series LF53 is factory preset to standard pres-
sure settings of 75, 100 or 125 (5.2, 6.9 or 8.6 bar). The LF53,
LF530C features Lead Free* construction to comply with
Lead Free* installation requirements.
Features
• Lead Free* brass
• Stainless steel springs
• Calibrated adjustment feature (Model LF530C)
• Protects against buildup of excessive pressure
• For use in systems containing water, oil, and air
Models
LF530C Pressure relief valve with calibrated adjustment feature
LF53 Pressure relief valve
LF530C LF53
Materials
Body: Lead Free* brass
Springs: Stainless steel
Disc: Buna-N
Pressure
½" – ¾" LF530C Pressure Range : 50 – 175psi (3.4 – 12.1 bar)
¾" LF530C Pressure Range: 100 – 300psi (6.9 – 20.7 bar)
LF53 Pressure Range: 75-125psi (5.2 - 8.6 bar)
Dimensions – Weights
LEAD FREE
*
Series LF53, LF530C
The Watts products shown on this page are small type relief
valves. Construction of these products does not meet the
(ANSI Z21.22) nationally recognized applicable standard.
NOTICE
ES-LF53_LF530C 2033 © 2020 Watts
USA: T: [phone] • F: [phone] • Watts.com
Canada: T: [phone] • F: [phone] • Watts.ca
Latin America: T: (52) 55-4122-0138 • Watts.com
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts
reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications
on Watts products previously or subsequently sold.
*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
NOTICE
Inquire with governing authorities for local installation requirements
The information contained herein is not intended to replace the full
product installation and safety information available or the experience
of a trained product installer. You are required to thoroughly read all
installation instructions and product safety information before begin-
ning the installation of this product.
NOTICE
DIMENSIONS
MODEL SIZE HEIGHT WIDTH WEIGHT
in in mm in mm lbs. gms
LF53
1
⁄2 or
3
⁄4 2
7
⁄8 73 1
3
⁄4 44
1
⁄2 227
LF530C
1
⁄2 or
3
⁄4 3 76 1
5
⁄8 41
5
⁄8 284