DatasheetDynisco PG4 Series Mechanical Pressure Gauges
The Dynisco PG4 Series includes mechanical pressure gauges for direct, local melt pressure indication on extruders and other polymer processing equipment. The gauges are especially suitable for applications requiring simple, maintenance-free pressure indication without the need for an external power supply.
Polymer pressure is sensed by a metal diaphragm mounted flush with the inside surface of the extruder barrel. This sealed diaphragm design helps eliminate grease and prevents melt contamination and gauge plugging. The pressure is indicated directly on the mechanical readout gauge.
Depending on the installation requirements, rigid snout and flexible stem versions are available. On the rigid snout version, the gauge head can be rotated 300° for unobstructed viewing. For applications involving high temperatures or restricted spaces, flexible stem versions allow the gauge to be mounted farther away from the process. Thermocouple or RTD configurations are also available to provide melt temperature measurement.
| Type | Mechanical pressure gauge for direct local readings |
|---|---|
| Series | Dynisco PG4 Series |
| Application | Direct melt pressure indication on extruders and polymer processing equipment |
| Measuring principle | Mechanical pressure transmission via metal diaphragm and indication on readout gauge |
| Design | Mechanical design, maintenance-free and without external power supply |
| Pressure ranges | 0…5,000 psi or 0…10,000 psi |
| Combined error | ±2 % FS |
| Zero adjustability | 7.5 % FS |
| Maximum pressure | 1.5 × FS |
| Needle sweep | 270° |
| Thermocouple | Type J, standard |
| Maximum diaphragm temperature | 750 °F / 400 °C |
| Maximum case temperature | 275 °F / 135 °C |
| Case material | Stainless steel with safety glass |
| Mounting torque | 500 inch/lbs maximum |
| Weight | 2…3 lbs, depending on configuration |
| Standard wetted parts | TiN coated 15-5 PH stainless steel |
| Gauge head | Rotates 300° on the rigid snout version |
| Mounting versions | Rigid snout or flexible stem version |
| Optional temperature measurement | Thermocouple or RTD configurations available for melt temperature measurement |
| Key features | Direct local reading, mechanical design, sealed diaphragm, stainless steel construction, flexible or rigid mounting version |
