Steam Engine Build/Valve - Revision history

Mjn at 14:06, 2 July 2011

2011-07-02T14:06:51Z

← Older revision		Revision as of 14:06, 2 July 2011
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	[[Steam Engine Build Instructions]]		[[Steam Engine Build Instructions]]

	~~[[Image:Cad-Valve.png\|thumb]]~~
	=Description=		=Description=

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	Two valves are needed.		Two valves are needed.

			=CAD=

			[[Image:cad-valve-1.png]][[Image:cad-valve-2.png]]

	=Drawing=		=Drawing=

	[[Image:Spec-Valve.png]]		[[Image:Spec-Valve-2.png]]

	=Instructions=		=Instructions=
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	'''Materials:'''		'''Materials:'''

	* 2.5" steel round stock, about 3.0" long.		* 2.0" steel round stock, about 2.0" long.

	'''Fabrication'''		'''Fabrication'''

	# Mount the stock in a metal lathe		# Mount the stock in a metal lathe
	# Reduce the valve ~~head diameter~~ to 2.4" for 0.4".		# Reduce the valve stem to 1.24" diameter for a length of 1.03"
	# Machine a 45 degree bevel to form the valve head.		# Machine a 45 degree bevel to form the valve head.
	# ~~The point~~ of the valve head ~~should be~~ 0~~.800~~" ~~in diameter~~.		# Outer diameter of the valve head is 2.0".
	# ~~Reduce the remaining stock to 1.231" to form the valve tail.~~		# Valve head should be 0.8" long.
	~~# Reduce the end of the valve tail to 0.875" to form the spring insert for~~ 0.75".
	# Polish the valve head point.		# Polish the valve head point.
	# Polish the valve tail so that it may move freely in the valve hole of the valve cover.		# Polish the valve tail so that it may move freely in the valve hole of the valve cover.

Mjn at 12:02, 11 June 2011

2011-06-11T12:02:59Z

← Older revision		Revision as of 12:02, 11 June 2011
Line 3:		Line 3:
	[[Steam Engine Build Instructions]]		[[Steam Engine Build Instructions]]

			[[Image:Cad-Valve.png\|thumb]]
	=Description=		=Description=

Mjn at 13:02, 26 May 2011

2011-05-26T13:02:57Z

← Older revision		Revision as of 13:02, 26 May 2011
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	{{Category=Steam Engine}}		{{Category=Steam Engine}}

			[[Steam Engine Build Instructions]]

	=Description=		=Description=

Mjn at 12:57, 26 May 2011

2011-05-26T12:57:04Z

← Older revision		Revision as of 12:57, 26 May 2011
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	=Drawing=		=Drawing=

	[[Image:~~valve~~-~~spec~~.png]]		[[Image:Spec-Valve.png]]

	=Instructions=		=Instructions=

Mjn: Created page with "{{Category=Steam Engine}} =Description= The valve controls the flow of steam from the steam chest to the cylinder bore. Steam is admitted into the cylinder just before top dea..."

2011-05-26T03:10:40Z

Created page with "{{Category=Steam Engine}} =Description= The valve controls the flow of steam from the steam chest to the cylinder bore. Steam is admitted into the cylinder just before top dea..."

New page

{{Category=Steam Engine}}

=Description=

The valve controls the flow of steam from the steam chest to the cylinder bore. Steam is admitted into the cylinder just before top dead center of the stroke cycle. One end of the valve is conical in shape (45 degree) machined to match the valve seat. In the middle of the valve stem, the valve diameter is reduced to slide freely inside the valve hole of the valve cover. At the other end, the diameter is further reduced to fit inside the valve spring.

Two valves are needed.

=Drawing=

[[Image:valve-spec.png]]

=Instructions=

'''Materials:'''

* 2.5" steel round stock, about 3.0" long.

'''Fabrication'''

# Mount the stock in a metal lathe
# Reduce the valve head diameter to 2.4" for 0.4".
# Machine a 45 degree bevel to form the valve head.
# The point of the valve head should be 0.800" in diameter.
# Reduce the remaining stock to 1.231" to form the valve tail.
# Reduce the end of the valve tail to 0.875" to form the spring insert for 0.75".
# Polish the valve head point.
# Polish the valve tail so that it may move freely in the valve hole of the valve cover.

[[Category:Steam Engine]]