Pneumatic Valve Positioner

Pneumatic Valve Positoner – Application

  • NON-STANDARD CONTROLLER OUTPUT :
    The positioner is used to operate a valve with 3-15 psi spring range when controller signal is other than 3 –15 psi.
  • NON-STANDARD ACTUATOR SPRING RANGE :
    The positioner is used to operate valves Having non standard actuator spring ranges by controllers having the standard 3-15 psi Signal pressure.
  • REMOTE VALVE LOCATION :
    When air operated control valves are located far from control Instrument, positioners will reduce lag, thereby speeding up valve operation.
  • SPLIT RANGE :
    Some processes require the dual or sequential operation of two to three Control valves by a single controller with a 3-15 psi output signal range.
  • IMPROVES OVER ALL PERFORMANCE :
    When process lags necessitate the use of wide Controller proportional band, the positioner provides an exact means of making the control Valve responsive to infinitely small changes in controller output pressure.

Pneumatic Valve Positoner – Specifications

MODEL PVP-1 Single Acting – Direct Action.

PVP-2 Single Acting – Reverse Action.

PVP-3 Double Acting – Direct Action.

SUPPLY CONNECTION 1 /4” NPT (F)
SUPPLY AIR PRESSURE 1.4 To 3.5 kg/cm² (Standard.)

5.0 kg/cm² (Maximum)

INPUT 0.2 – 1.0 kg/cm² (Standard)

0.2 – 0.6 kg/cm² (Split Range)

0.6 – 1.0 kg/cm² (Split Range)

HYSTERESIS Within ± 1% of FS.
LINEARITY Within ± 1% of FS.
DEAD BAND Within 0. 1% of FS.
STROKE SPEED (Max) 10mm/sec
STROKE 14 mm to 100mm
AIR CONSUMPTION 7.0 NL / Min (Normal.)
AIR FLOW CAPACITY 200 NL / Min (Maximum.)

Pneumatic Valve Positoner – Material Of Construction

HOUSING Die cast aluminum to LM – 6.
INTERNALS & LINKAGE AISI 304
DIAPHRAGM Nitrile / Neoprene with nylon fabric reinforcement.

Design And Performance Features

  • High sensitivity and stability.
  • Simple zero and span adjustments.
  • Field reversibility.
  • Large port pilot relay eliminates the air passage blockage.
  • Internal components are of stainless steel.