Buying Guide

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NIBCO INC. WORLD HEADQUARTERS • 1516 MIDDLEBURY ST. • ELKHART, IN 46516-4740 • USA • PH: 1.800.234.0227
TECH SERVICES PH: 1.888.446.4226 • FAX: [phone] • INTERNATIONAL OFFICE PH: +1.574.295.3327 • FAX: [phone]
www.nibco.com
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AHEAD OF THE FLOW
®
Revised 7/20/2018
Iron Body Swing Check Valves are available with Outside Lever and
Weight or Lever and Spring
The lever and weight arrangement is used to maintain exterior control over disc movement. It is possible
to assist the disc to close rapidly where quick action is necessary to avoid a sudden reversal of flow or set
the lever and weight at any position to get desired operating performance.
Illustrated below are some commonly accepted positions of the lever and weight.
The lever and weight is mounted on the right side of the valve when facing the inlet.
Available on Figure no. F-918 in sizes 2¹⁄₂"–12".
Lever and spring provides more positive control in closing the disc.
Tension of the spring may be adjusted to control the pressure against the disc.
Silicone lubricant is used in production of butterfly, flanged steel ball valves, and iron check
valves at the Blytheville, Arkansas, Plant
Multi-turn Iron Valves: Gate, Globe, Angle and Check
The silicone used is in the form of grease, and is applied to the seat.
High Performance butterfly valves do NOT use silicone in assembly.
NOTE: Valves that are assembled and tested without silicone lubricants in this plant have a potential
exposure to air-born silicone as well as during shipping after they leave the plant. Therefore, NIBCO
cannot certify valves produced in the Blytheville plant to be 100% silicone free.
Special Ordered Check Valves:
We will, upon request, assemble check valves that are described as “Assembled-Dry”. These valves are
assembled NOT using the silicone grease.
NIBCO
®
Check Valves may be installed in both horizontal and vertical lines with upward flow or in any
intermediate position. They will operate satisfactorily in a declining plane (no more than 15º).
WARNING: Do not use for reciprocating air compressor service.
Iron Check Valve Options and Accessories
Lever and Weight/Spring
(factory installed only)
Fig. No. F-918-BL&S
Lever and weight mounted to assist the disc in closing.
for use in
vertical lines
for upward flow
for use in
horizontal lines
NIBCO INC. reserves the right to change materials, options and accessories without notice.