VALVESLESSON SEVEN

DEFINITIONA device used to regulate or control the flow of fluids ( liquid, air or gas ), in pipeings, systems and in machinery.

DEFINITIONA device used to regulate or control the flow of fluids ( liquid, air or gas ), in pipeings, systems and in machinery.2. VALVE OPERATING GEAR Cam Roller Tapet Push rod Rocker arm / lever Valve spring Valve

3. PARTS Valve cage - valve housing. Valve stem / valve spindle the rod by means of which the disk or plug is moved to open or close a valve. Valve head / valve lid disk part of poppet valve that gives a tight closure on the valve seat. Valve seat the circular metal ring on which the valve head / valve disk / valve plug of a poppet valve rests when closed.

3. PARTS Valve cage - valve housing. Valve stem / valve spindle the rod by means of which the disk or plug is moved to open or close a valve. Valve head / valve lid disk part of poppet valve that gives a tight closure on the valve seat. Valve seat the circular metal ring on which the valve head / valve disk / valve plug of a poppet valve rests when closed. Valve guide a channel which supports the stem of a poppet valve for maintanance and alignment.

3. PARTS Valve cage - valve housing. Valve stem / valve spindle the rod by means of which the disk or plug is moved to open or close a valve. Valve head / valve lid disk part of poppet valve that gives a tight closure on the valve seat. Valve seat the circular metal ring on which the valve head / valve disk / valve plug of a poppet valve rests when closed. Valve guide a channel which supports the stem of a poppet valve for maintanance and alignment. Valve rorator a device rotating the valve stem.

Adjusting valve clearance

3. PARTS Valve cage - valve housing. Valve stem / valve spindle the rod by means of which the disk or plug is moved to open or close a valve. Valve head / valve lid disk part of poppet valve that gives a tight closure on the valve seat. Valve seat the circular metal ring on which the valve head / valve disk / valve plug of a poppet valve rests when closed. Valve guide a channel which supports the stem of a poppet valve for maintanance and alignment. Valve rorator a device rotating the valve stem.POPPET VALVE is a cam-operated or spring loaded reciprocating engine mushroom type valve used for control of admission and exhaust of working fluid. Its direction of movement is at right angle to the plane of its seat.OHV engine means overhead valve engine, i.e. an engine having valves in the head.

4. MATERIALS Valve stem / valve spindle of heat resistant steel Valve seat steel with stellite welded on it ( 65% Cobalt, 32% Chromium, 3% Tungsten )

4. MATERIALS Valve stem / valve spindle of heat resistant steel Valve seat steel with stellite welded on it ( 65% Cobalt, 32% Chromium, 3% Tungsten ) Valve cage cast iron

4. MATERIALS Valve stem / valve spindle of heat resistant steel Valve seat steel with stellite welded on it ( 65% Cobalt, 32% Chromium, 3% Tungsten ) Valve cage cast iron5. STRESSESHigh pressure and temperature due to combustion.

4. MATERIALS Valve stem / valve spindle of heat resistant steel Valve seat steel with stellite welded on it ( 65% Cobalt, 32% Chromium, 3% Tungsten ) Valve cage cast iron5. STRESSESHigh pressure and temperature due to combustion.6. REQUIREMENTS Strong, sturdy construction / manufacture. Carefully cooled

4. MATERIALS Valve stem / valve spindle of heat resistant steel Valve seat steel with stellite welded on it ( 65% Cobalt, 32% Chromium, 3% Tungsten ) Valve cage cast iron5. STRESSESHigh pressure and temperature due to combustion.6. REQUIREMENTS Strong, sturdy construction / manufacture. Carefully cooled7. COOLINGIs executed by F.W. circulation, as excessive temperature may give rise to damage by cracking.

8. MATERIALCast or forged steelSpecial cast iron