AIR FILTER PRESSURE REGULATORS (Aluminium)
Your Air-Actuated Instument and Equipment work at their best for a long period when you feed with clean dry air at a constant prescribed pressure.
PLACKA FPR-Series Air filter-cum-Pressure Regulator removes completely the moisture and dust particles, and provides the exact pressure constantly at varying air demands. Its compactness and highly accurate performance for a long period with minimum of maintainance make for an optimum compromise between the ideal and the practical, consisten with end-use.
This economically prices unit is extensively used for Process Control Instruments, Air-actuated Control Valves, Cylinders and other equipments.
Salient Features
- Longer life assured as the materials used are selected for their corrosion resistance and long wear.
- Excellent characteristics throughout the full flow range particularly at low flow zone in which the unit usually serves Instruments.
- Negligible pressure drop due to high porosity ratio of the filter. The filter is reusable and has a high impact strength.
- In addition to solid particles, the unit extracts a high percentage of water thus ensuring trouble-free service even in the most adverse conditions.
- Built-in relief ensures rapid response to circuit-induced pressure changes.
- The dust and liquid contaminants can be fully drained out when the Regulator is mounted both vertically and horizontally as in the case of Control Valves, Transmitters, etc.
- Custom made Unit for Control Valves, Transmitters and other field mounted Instruments.
- Regulator adjustment knob is easily lockable by the finger operated locking nut.
- Simple, versatile built in mounting arrangements by bolts and clamps. For panel mounting, tapped holes are provided at the top of the spring case for mounting screws.
- Most economically priced.
- Model FPR-S with SS components instead of brass, for corrosive working conditions of fertilizers, refinery and stell plants.
Specifications
- Service : Air
- Max. Inlet Pressure : 250 PSI, 18 kg/cm2
- Enclosure : Weather Proof(IP65)
- Outlet Pressure Ranges : Refer Table 1
- End Connections : 1 inlet, 1 outlet and 1 pressure gauge port
- End Connections : 1 inlet, 1 outlet and 1 pressure gauge port
- Bowl Capacity : 130 cc(Approx.)
- Ambient Temperature : Upto 80 degree C
- Adjustment know with nut : Unbreakable plastic moulded on C.S stem(SS on request)
- Body Spring Case and Filter Bow l: Die Cast Aluminium ally
- Filter : Sintered Bronze/ Porus Plastic 15 Microns standard 5 & 25 Microns Optional
- Main Valve : Neoprene Moulded on SS stem
- Drain Valve : Brass-Standard(SS on request)
- Main Valve Spring : SS
- Diaphragm : Nylon Reinforced Neoprene
- Main Spring : Spring Steel
- Body Spring Case and Filter Bowl : Die Cast Aluminium ally
- Mounting : Surface or Panel
- Main Valve : Neoprene Moulded on SS stem
Operation
The primary air through the inlet port, passes through the filter element, leaving down the contaminants in the bowl. When the knob is adjusted suitably, the spring acts on the diaphragm which in turn actuates the main valves to allow the pure secondary air at a particular pressure to the outlet. The main valve is supported between the relief valve and the main valve spring, eliminating the need for stem guiding, Toggle action between main valve and drelief vavle completely eliminates the alignment problems and thus, erratic output pressure.
Regulation Characteristics
The secondary pressure at the bottom of the diaphragm balances against the set position of the main spring to keep the main valve at the adjusted position. When the secondary pressure rises above the set point, it pushes the diaphragm away from the relief valve and the excess air finds its way to atmosphere through the bleed hole.
Flow Characteristics
When the air flow from the Regulator is increased the secondary pressure falls belwo the set point. This ‘pressure drop’ in supply will force your equipment to function erratically. But PLACKA Air Set reduces the pressure drop successfully by an aspirator. The aspirator connects the outlet port and the chamber under the diaphragm. When flow increases, the aspirator creates a lower pressure below the diaphragm, which in turn forces the main valve to open further and thus more air flows in to compensate the pressure drop.
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