How Armstrong Steam Harness Works

Learn How Armstrong Steam Harness Gives You Real-time Access to Key Parameters

1. Plant steam enters Armstrong Steam Harness.
2. Manual butterfly valve at inlet provides complete isolation, as needed.
3. The Armstrong Steam QM®-1 sensor can be relocated to available nozzle, as needed, to measure steam quality upstream of Armstrong Steam Harness.
4. 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)
5. 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)
6. 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.
7. 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)
8. VERIS Accelabar® measures steam flow and compensates for changes in steam pressure, signal transmitted to pellet mill or extrusion control system. (D)
9. Armstrong Steam QM®-1 measures steam quality; information transmitted via Modbus to PLC/HMI supplied by Armstrong. (E)
10. Armstrong GP-2000 PRV reduces steam pressure. (F)
11. Safety relief valve (ASME Code, as required).
12. Visual pressure gauge and pressure transducer installed downstream of PRV translates reduced steam pressure and transmits signal to PLC/HMI supplied by Armstrong. (G)
13. 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)
14. 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)
15. 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)
16. 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.
17. Flexible connector, made of stainless steel corrugated hose and single stainless steel braid, absorbs vibration from conditioner chamber. (K)
18. Electrical cabinet with PLC and HMI supplied by Armstrong. (L)

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