Maxton UC1A - OVERSPEED VALVE (PIPE RUPTURE; SHUT OFF VALVE); Introduction; Specifications; Standard Features

1728 Orbit Way - Minden, Nevada 89423 P: 775-782-1700 F: 775-782-1701 info@maxtonvalve.com www.maxtonvalve.com
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Introduction
The Maxton Overspeed Valve (Pipe Rupture / Shut Off Valve) is designed to provide protection
against supply line failure or over speed in the down direction. The OSV can be adjusted to stop the
elevator in the event of an over speed condition caused by a broken supply line or an abnormally
high rate of flow between the OSV and the power unit. The OSV should be mounted as close the
Jack as possible. The OSV complies with UFGS 14 24 00 - 2.4.2.2 and ASME A17.1 / CSA B44.
Specifications
Standard Rated Contract Flow
OSV E1 30 - 100 gpm (114 - 379 l/min)
OSV STD 100 - 300 gpm (379 - 1136 l/min)
Operating Pressure
Minimum 50 psi (3.4 bar)
Maximum 800 psi (55 bar)
Line Connections
Jack Port (Flange) 2, 2½” NPT or Grooved
Tank Port (Flange) 2, 2½” NPT or Grooved
Operating Temperature 80
°-150° F (26° - 65° C)
Oil Type Hyd. ISO VG 32
150 SUS @ 100
° F (38° C)
Overall Dimensions
Width 11 1/4 inches (286mm) Height 10 1/8 inches (257mm)
Depth 6 9/16 inches (167mm) Weight 28 lbs. (12.7kg)
Standard Features
 Works on pressure drop, no electricity is
required.
 Incorporates a manual shut off for use as
a pit shut off valve.
 Adjustable closing rate.
 Unit body construction.
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 Steel sleeve inserts in valve body. 
 Grooved or threaded line connections. 
 Individualized adjustments. 
 Factory tested prior to shipping. 
 2 year limited warranty. 
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OponalFeatures
 3" Grooved flanges 
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Front View
OVERSPEED VALVE (PIPE RUPTURE / SHUT OFF VALVE)
MANUAL SHUT-OFF
TRIPPING SPEED
ADJUSTER (TS)
CLOSING RATE
ADJUSTER (CR)