How Armstrong Steam Harness Works
Learn How Armstrong Steam Harness Gives You Real-time Access to Key Parameters
- Plant steam enters Armstrong Steam Harness.
- Manual butterfly valve at inlet provides complete isolation, as needed.
- The Armstrong Steam QM®-1 sensor can be relocated to available nozzle, as needed, to measure steam quality upstream of Armstrong Steam Harness.
- Drip leg captures condensate and dirt from plant steam distribution; Armstrong TVS inverted bucket steam trap drains condensate from drip leg; high pressure condensate return valve allows manual removal of particles captured by drip leg. (A)
- Drain separator removes moisture and particles greater than 10 microns from steam; Armstrong TVS inverted bucket steam trap drains condensate from drain separator; high pressure condensate return. (B)
- Visual pressure gauge and pressure transducer installed at the top of separator translates inlet steam pressure and transmits signal to PLC/HMI supplied by Armstrong.
- Steam passes through Y-type strainer that captures particles greater than 0.0055”; valve allows manual removal of particles; dirt goes to atmospheric discharge. (C)
- VERIS Accelabar® measures steam flow and compensates for changes in steam pressure, signal transmitted to pellet mill or extrusion control system. (D)
- Armstrong Steam QM®-1 measures steam quality; information transmitted via Modbus to PLC/HMI supplied by Armstrong. (E)
- Armstrong GP-2000 PRV reduces steam pressure. (F)
- Safety relief valve (ASME Code, as required).
- Visual pressure gauge and pressure transducer installed downstream of PRV translates reduced steam pressure and transmits signal to PLC/HMI supplied by Armstrong. (G)
- Drip leg collects and drains condensate trapped between PRV and automatic on/off full port ball valve installed downstream, condensate drained to low pressure condensate return; thermostatic steam trap removes subcooled condensate, air and noncondensable gases (NCG), drained to atmospheric discharge. (H)
- On/off flanged full port ball valve with electro-pneumatic actuator is controlled by pellet mill or extrusion control system; mechanical switches available to confirm complete opening of valve to pellet mill or extrusion control system. (I)
- Pellet mill or extrusion control system transmits signal to multilingual intelligent positioner located on a Python® control valve, which feeds steam into conditioner chamber; digital positioner sends feedback signal to pellet mill or extrusion control system, confirming opening percentage of control valve; all steam is direct injection. (J)
- Visual pressure gauge and temperature transducer installed downstream of control valve monitors steam temperature feed to pellet mill or extruder and delivers information to operator.
- Flexible connector, made of stainless steel corrugated hose and single stainless steel braid, absorbs vibration from conditioner chamber. (K)
- Electrical cabinet with PLC and HMI supplied by Armstrong. (L)
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