Data Sheet

Bulletin LP-7:C471/C477
2
1. The pressure/temperature limits in this Bulletin and any applicable standard or code limitation should not be exceeded.
2. Product has passed Fisher
®
testing for leakage down to -40ºF / -40ºC.
Kalrez
®
is a mark owned by E.I. du Pont de Nemours and Co.
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Body Size and End Connection Style
Inlet: 2 or 3-inch MNPT / DN 50 or 80
Outlet: 2 or 3-inch FNPT / DN 50 or 80
Number of Outlets
Type C471: 2 (side and straight through)
Type C477: 1 (straight through)
Excess Flow Springs
Half Coupling Flows:
2-inch Sizes / DN 50: 105, 150, and 250 GPM /
397, 567, and 946 L/min
3-inch Sizes / DN 80: 160, 265, 375, and 460 GPM /
605, 1003, 1419, and 1741 L/min
Full Coupling Flows:
2-inch Sizes / DN 50: 60, 80, and 130 GPM /
227, 302, and 492 L/min
3-inch Sizes / DN 80: 120, 230, 320, and 380 GPM /
454, 870, 1211, and 1438 L/min
Maximum Allowable Inlet Pressure

400 psig / 27.6 bar WOG
Temperature Capabilities
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-20 to 150°F / -29 to 66°C
Construction Materials
Steel Body and Operating Lever
Stainless steel
Stem Assembly, Excess Flow Spring, Spring
Seat, Closing Spring, Disc Holder, Disc
Retainer, Screw, O-ring Seat, O-ring Retainer,
Cotter Pin, Spring, Shaft, Screen, Travel Stop,
Screen Cap, Bolt, Gasket, and Lock Washer
Plated steel
Nut, Washer, Bonnet Nut, Guide Bracket, and
Cap Screw
Polyurethane Rod Wiper
PTFE Bushing, Packing Adaptor, and Packing Ring



Main Disc and Bleed Disc
Other Disc and O-ring
Material Available
from Factory
PTFE, Fluorocarbon (FKM), Neoprene (CR),
Ethylene-Propylene (EPDM), and Kalrez
®
Closing Flow and Vapor Capacity
See Table 2
Approximate Weights
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Type C471: 11 pounds / 5 kg
Type C477: 9 pounds / 4 kg
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Type C471: 21 pounds / 10 kg
Type C477: 16 pounds / 7 kg