Exhaust Valve

how does an exhaust valve on a sulzer wallen engine work?

how does an exhaust valve on a sulzer wallen engine work? I can not find a good explanation of how it works so i'm wondering if anyone knows?

I am not sure what you mean by Wallen, but I can give you some information about current Sulzer practice.
As your question refers specifically to an exhaust valve, I have assumed that you are referring to a two-stroke engine. Modern Sulzer practice is to use the uniflow scavenging principle for their two-strokes as they can be developed to produce more power than the loop-scavenged type.
Uniflow engines are scavenged at the end of each working stroke by ports in the cylinder wall admitting scavenging air at above atmospheric pressure. Simultaneously a valve in the cylinder cover opens or an upper piston connected to the crankshaft, either by crankthrows or eccentrics, uncovers exhaust ports to enable the spent gasses to be expelled.
Sulzer practice is to use an exhaust valve. The valves are opened by hydraulic pressure from pumps driven by the camshaft which is mounted at mid-engine height. Compressed air is employed to close the exhaust valves. The Sulzer-Wartsila engines currently in production use this system.

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Quality Exhaust Pipe Blowoff Valve Whistler Turbo Sound Muffler Tip Simulator
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NEW PARKER 0R25PB EXHAUST VALVE
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Km1319 Goyen Repair Kit For Goyen Quick Exhaust Valves Qty 14 Milnor
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Ross 2773A3072 NPT L O X Solenoid Pilot Valve with Lockout  Exhaust
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Ross 517M1 Threaded Exhaust Flow Control Valve New No Box
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SMC VHS50 N10 Z Pneumatic Quick Exhaust Lockout Shut Off Valve Pressure Relief
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PARKER 1 4 QUICK EXHAUST VALVE OR25B 10 BAR 150 PSI
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Humphrey SRKQE Exhaust Valve Repair Kit
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Mac Valves 45A AA1 DFFA 1CM Solenoid 1 8 45AAA1DFFA1CM W Exhaust Damper 24VDC
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GENUINE PROMATCH EXHAUST VALVE A000029124 CTA000029124 00170 A AH 4 PACK
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1PC SMC Exhaust Valve ASV310F 02 08S
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Briggs  Stratton Exhaust Valve 691794 390419 FITS 6 THRU 8HP FREE SHIPPING
Briggs Stratton Exhaust Valve 691794 390419 FITS 6 THRU 8HP FREE SHIPPING
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E Z GO 72508G01 Exhaust Valve295 350cc G3950950
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FESTO EXHAUST VALVE RAPID SE 3 8 B NEW SE38B
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Deltrol EV 125A Exhaust Valve
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Rexroth 5352620000 C15i Airline Quick Exhaust FRL Ball Valve Shut Off
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TEL TOKYO ELECTRON MKS EXHAUST THROTTLE VALVE ETVB 29895
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NEW AIGNEP 1 2 BSPP FEMALE QUICK EXHAUST VALVE PN 6050 12
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Lot of 2 New Deltrol 10122 70 Pneumatic Exhaust Valve EV25A2 O8
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FESTO SE 1 2 B QUICK EXHAUST VALVE 03 10BAR NNB
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MARTIN ENGINEERING EXHAUST VALVE
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Spirax Sarco 80085 Exhaust Valve Kit
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GENUINE PROMATCH CATERPILLAR EXHAUST VALVE A000012418 CTA000012418
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GENUINE PROMATCH CATERPILLAR EXHAUST VALVE A000012419 CTA000012419
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NEW SCHRADER 3640 EXHAUST VALVE NOS SHIPS FREE
NEW SCHRADER 3640 EXHAUST VALVE NOS SHIPS FREE
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MKS 252A Exhaust Valve Controller as is parts only
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SHOWA QUICK EXHAUST VALVE QV 4 PT1 2 LOT OF 2
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TAIYO QUICK EXHAUST VALVE QV2 15 CNC
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