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Title: Causes And Cures Of Regulator Instability
Author: William H. Earney
Source: 1992 International School of Hydrocarbon Measurement
Year Published: 1992
Abstract: h i s paper w i l l a d d r e s s the gas p r e s s u re r e d u c i n g r e g u l a t o r i n s t a l l a t i o n and the I s s ue o f e r r a t i c c o n t r o l of the downstream p r e s s u r e. A gas p r e s s u r e r e d u c i n g r e g u l a t o r s j o b is to m a n i p u l a t e flow in o r d e r to c o n t r o l p r e s s u r e. When the downstream p r e s s u r e is n o t p r o p e r ly c o n t r o l l e d the term u n s t a b l e c o n t r o l Is a p p l i e d . Figure I is a l i s t of o t h e r terms u s e d for v a r i o u s forms of downstream p r e s s u re i n s t a b i l i t y . This p a p e r w i l l n o t a d d r e s s the m a t h e m a t i c a l methods of d e s c r i b i n g the a u t o m a t i c c o n t r o l s y s t em of the p r e s s u re r e d u c i n g s t a t i o n , b u t w i l l d e a l w i t h more of t h e components and t h e i r a f f e c t on the system s t a b i l i t y . UNSTABLE PULSATE OSCILLATE BUZZ PAtNT HAMMER HUNT CYCLE PUMP CHUGS VIBRATE FLOATS SURGES

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