4109 - Vibro-Guard Valve

Features

● GULFPROOFED FINISH

● PNEUMATIC AND ELECTRIC VERSIONS AVAILABLE

● RELIABLE REPEATABILITY

● PNEUMATIC RESET/OVERRIDE AVAILABLE

Applications

● MOTORS

● ENGINES

● PUMPS

● COMPRESSORS

● FAN DRIVES

● ANY MOVING EQUIPMENT

Operation

AMOT Model 4109 Vibro-Guard Valve is a 2-way acceleration sensing valve with optional electric microswitch. It is closed under normal conditions and trips open to vent when vibration or shock exceeds the set level. This venting action, when used in a pneumatic safety control system, can be used to sound a pneumatic alarm or shut down malfunctioning equipment, or both. Failing bearings, broken blades, cracked, broken or bent shafts, misfiring, and accumulated deposits are a few of the items which the Vibro-Guard can detect.

The unit is available with an optional microswitch for applications where an electrical signal is desired. The valve may be reset manually or by means of a pneumatic cylinder in the cover. The pneumatic reset feature is also used as a starting or time-delay lockout when desired for machinery which vibrates heavily during start up. Since the standard unit is non-electric, it can be used in hazardous locations without an explosion-proof housing. This unit is weatherproof and corrosion protected for salt spray atmospheres (Gulf proofed).

The Model 4109 trip point is easily adjusted to the desired level of sensitivity after installation and is highly repeatable once set.

The Virbo-Guard is reset manually by pressing firmly on the Reset Button in the middle of the cover. It can be remotely set or "locked out" by pressurizing the reset port with 30 to 250 psi. Clean dry air or gas should be used in the control and reset systems. Be sure that the reset pressure is vented to atmosphere or to a manifold where there will be zero residual pressure, or the vent may not be completely "unlocked" when the reset pressure is removed.

Specification

Housing and Cover Material....Precision Cast Aluminium
Black Anodized
Internal Parts........................Aluminum and Plated Steel
Standard Seals.........................................................Viton
Maximum Operating Temperature..............200°F (93°C)
Maximum Valve Inlet Pressure..............90 psi (620 kPa)
Reset Pressure.....................30-250 psi (207-1724 kPa)
Valve Capacity (tripped) at 20 psi................................3 scfm (0.09 m 3 /min)
Flow Coefficient.....................................................C v =0.2
Vibration Sensing Range
mounted on horizontal surface.........................6G
mounted on vertical surface.............................5G
Switch Ratings..............................
125/250 VAC - 1/4 hp
125/250 VAC - 10 amp
28 VDC - 3 amp (inductive)
28 VDC - 24 amp max. inrush

Net Weight..........................................2.75 lbs. (1.25 kg)