NOSHOK 1200 User Manual

Gauge Inspection:

Please read the pr
gauge body to insure that this gauge is the same gauge

size, materials of construction, working pressure, di eren­tial pressure, etc. Inspect for any shipping damage and, if
discovered, report it immediately.

Product Design Features:

The NOSHOK 1200 Series is designed for working pressures
to 3,000 psig, with an over-range pressure and di

erential
pressures to 600 psid. This series is supplied, standard, with
a 4.5” dial or, optionally, with a 6” dial. The gauge has a 316L
sensor cell, encapsulating opposed, high (+) and low (-) side

pressur
them to move. This movement is transferred to a torque-tube
assembly, linked to a horizontally moving, bidirectional over­pressure valve (This valve protects the sensor membranes
against damage from high (+) and low (-) side overpressure
of the membranes in the sensor cell.) A torsion rod, located
within the torque-tube assembly, passes through a sealed
compr

rom the
dial case assembly) into the dial case and is connected to a
pinion/sector gear and pointer assembly. The twisting motion
of the torsion rod, driven by the membrane movement, is

ree, linear arc and pointer travel.

The gauge is supplied, standard, for panel mounting. The
mounting method is from front to back in the panel and the
gauge is secured in the panel with four (4) threaded studs,
supplied with the gauge. Optional pipe or wall mount kits are
available.

Gauge Connections:

Standard (2) x 1/4” FNPT back connections with high (+) and
low (-) connections clearly indicated. Optional connection
sizes and/or dual top/bottom connections are available.

Troubleshooting:

If the gauge is not indicating di

erential pressure, check to
insure both the high (+) and low (-) side connections have
been properly installed. Check to insure that there is pres­sure to the high (+) side of the gauge and that there is dif­ferential pressure across the device being monitored by the
1200 Series. If the gauge is being used together with
a three-valve manifold (recommended), check to insure that
the high (+) and low (-) valves are in the open position and
the equalizer valve is in the closed position. If, after following
these steps with no positive result, please contact the NOSHOK
Customer Service Department or your nearest NOSHOK
Distributor.

Gauge Mounting:

Design and Operating Principle

• Process pressures p1 and p2 are applied to the chambers

- (2) and + (3).

•

• Di erential pressure across + and - pressure sides

• The displacement of the connection rod (5) is converted

through the use of a transmitting lever (6) into rotation,

which is transferred over an axial shaft (7) to the move-

ment (9).

• The torque pipe (8) seals, assuring a frictionless path.

• Overpressure protection in both directions up to the max.

static pressure rating is provided by contoured metal

bolsters.

1200DFGTM-09

INCORPORATED

Corporate Headquarters

1010 West Bagley Road
Berea, Ohio 44017
Ph: 440.243.0888
Fax: [phone]
E-mail: [e-mail]
Web: www.noshok.com