Product Overview

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Caleffi North America, Inc.
3883 W. Milwaukee Road
Milwaukee, WI 53208
Tel: [phone] · Fax: [phone]
[e-mail] · www.caleffi.com/usa/en-us
© Copyright 2014 Caleffi North America, Inc.
519 series
Differential pressure by-pass valve. Union connections: 3/4" MNPT union inlet x 3/4" MNPT union outlet, 3/4" union press inlet x 3/4" union press
outlet, 3/4" sweat union inlet x 3/4" sweat unionoutlet, 1" FNPT inlet x 1" MNPT union outlet, 1" FNPT inlet x 1" sweat union outlet, 1-1/4" FNPT inlet x
1-1/4" MNPT union outlet and 1-1/4" FNPT inlet x 1-1/4" sweat union outlet. Brass body. Brass valve plug. EPDM valve plug gasket. EPDM O-Ring seals.
Asbestos free NBR union seals. ABS control knob. Stainless steel spring. Suitable fluids: water, or 30% glycol solution. Temperature range 32 to 230°F
(0 to 110°C). Maximum working pressure 150 psi (10bar). Setting range is 1 to 6 m w.g. (2 to 10 psi) and flow rates 3/4" flow up to 9 gpm, 1" flow up to
40 gpm and 1-1/4" flow up to 45 gpm.
SPECIFICATION SUMMARIES