Valves flutter

Figure 13-5. Compressor valve diagnostics and optimization procedure (A) compressor discharge valve flutter and (B) properly operating discharge valve. (Used by permission Southern Gas Association s Gas Machinery Research Council.)...

Pressure gauge shows fluctuating reading—can be due to flap in butterfly valve fluttering inside. Check the position of flap and tighten the lock nut. 

Several devices are also available to promote airway clearance. Flutter valve devices employ oscillating positive expiratory pressure (OPEP) to cause vibratory air flow obstruction and an internal percussive effect to mobilize secretions. Intrapulmonary percussive ventilation (IPV) provides continuous oscillating pressures during inhalation and exhalation. Finally the most commonly used technique is high-frequency chest compression (HFCC) with an inflatable vest that provides external oscillation. Vest therapy is often preferred by patients because they can independently perform the therapy even from an early age.5,14... 

VALVE SURG DRAIN HEIMLICH 4.50" LG 1 DIA FLUTTER RBBR STER 10S 6515009269150 PG 189.91 ... 

Chatter, simmer or flutter Abnormal, rapid reciprocating motion of the movable parts of a PRV in which the disc makes rapid contacts with the seat. This results in audible and/or visible escape of compressible fluid between the seat and the disc at an inlet static pressure around the set pressure and at no measurable capacity, damaging the valve rapidly. 

Even though the valve may be stable during a relief cycle, the bellows itself can still flutter during a relief cycle due to the high turbulence in the body bowl or vibration due to compressors or pumps in the system. This rapid flexing of the bellows convolutions will result in cold working of the bellows material and welds (Figure 10.11). 

Saturate a rag with the disinfectant and sponge the entire inner surface of the facepiece, including the outer and inner. side of the deflator. Apply Uisiiifeetant similarly to the outside of the flutter valve. 

A 55-year-old man is admitted to the ED for VT. Vital signs BP 105/86 mm Hg, HR 138 beats/min, and RR 20 breaths/min. PMH diabetes, CHF, atrial flutter, mitral valve regurgitation, and HTN. Labs are within normal limits except for a slightly low serum sodium. What is a reason for starting lidocaine at a lower dose in this patient ... 

Elevation Control. Elevation was controlled in the diffusion chambers by a 42-inch butterfly valve, electrically operated. The valve design included a raised seat for the butterfly. This valve, at times, opened to a certain point, then fluttered with such force as to break the driving linkage. Eventually the valve was removed from the line, the raised seat machined out, a new butterfly installed, and heavier driving mechanism provided. 

FIGURE 17-6. Algorithm for the treatment of atrial fibrillation and atrial flutter. Sx = symptoms AVN = AV node DCC = direct-current cardioversion CCB = calcium channel antagonist (verapamil or diltiazem) BB = jS-blocker ASA = aspirin OHD = organic heart disease AADs = antiarrhythmic drugs INR = international normalized ratio MVD = mitral valve disease CHF = congestive heart failure HTN = hypertension DM = diabetes mellitus. 

Langenderfer B. Alternatives to percussion and postural drainage. A review of mucus clearance therapies percussion and postural drainage, autogenic drainage, positive expiratory pressure, flutter valve, intrapulmonary percussive ventilation, and high-frequency chest compression with the ThAIRapy Vest J Cardiopulm Rehabil 1998 18(4) 283-289. 

Do not use valve or flutter cap trays. The valve caps stick to the tray deck and promote high-pressure drop and flooding. Use a grid tray with a one-half-inch cap lift. Pro-valves are a good option. 

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