Steam Engine Build/Valve Spring Base - Revision history

Mjn at 13:06, 2 July 2011

2011-07-02T13:06:36Z

← Older revision		Revision as of 13:06, 2 July 2011
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	The valve spring base is a small disk that fits at the bottom of the valve hole in the valve case. It gives the valve spring adjustment screw a base to push against the valve spring, thus increasing the spring pressure against the valve and the valve seat. This adjustment may be needed to prevent steam from leaking through the valve seat at in appropriate times. The selected valve spring exerts a pressure of 162 lbs. when it is compressed to 1.475 inches, which means the steam engine can be run up to about 150 psi of steam pressure (with a safety factor).		The valve spring base is a small disk that fits at the bottom of the valve hole in the valve case. It gives the valve spring adjustment screw a base to push against the valve spring, thus increasing the spring pressure against the valve and the valve seat. This adjustment may be needed to prevent steam from leaking through the valve seat at in appropriate times. The selected valve spring exerts a pressure of 162 lbs. when it is compressed to 1.475 inches, which means the steam engine can be run up to about 150 psi of steam pressure (with a safety factor).

	~~Two~~ valves spring bases are needed.		Four valves spring bases are needed for design 7 of the steam engine.

	=CAD=		=CAD=
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	# Reduce the diameter to 0.240" for 0.250".		# Reduce the diameter to 0.240" for 0.250".
	# Cut off to a thickness of 0.250"		# Cut off to a thickness of 0.250"
			# Make four per engine.

	Finishing is not needed unless very rough.		Finishing is not needed unless very rough.

	[[Category:Steam Engine]]		[[Category:Steam Engine]]

Mjn at 13:05, 2 July 2011

2011-07-02T13:05:23Z

← Older revision		Revision as of 13:05, 2 July 2011
Line 8:		Line 8:

	Two valves spring bases are needed.		Two valves spring bases are needed.

			=CAD=

			[[Image:cad-valve-spring-base.png]]

	=Drawing=		=Drawing=

Mjn at 12:05, 11 June 2011

2011-06-11T12:05:11Z

← Older revision		Revision as of 12:05, 11 June 2011
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	{{Category=Steam Engine}}		{{Category=Steam Engine}}
			[[Steam Engine Build Instructions]]

	[[Image:Cad-Valve-Spring-Base.png\|thumb]]		[[Image:Cad-Valve-Spring-Base.png\|thumb]]

Mjn at 12:04, 11 June 2011

2011-06-11T12:04:27Z

← Older revision		Revision as of 12:04, 11 June 2011
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	{{Category=Steam Engine}}		{{Category=Steam Engine}}

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

Mjn: Created page with "{{Category=Steam Engine}} =Description= The valve spring base is a small disk that fits at the bottom of the valve hole in the valve case. It gives the valve spring adjustment..."

2011-05-26T12:53:31Z

Created page with "{{Category=Steam Engine}} =Description= The valve spring base is a small disk that fits at the bottom of the valve hole in the valve case. It gives the valve spring adjustment..."

New page

{{Category=Steam Engine}}

=Description=

The valve spring base is a small disk that fits at the bottom of the valve hole in the valve case. It gives the valve spring adjustment screw a base to push against the valve spring, thus increasing the spring pressure against the valve and the valve seat. This adjustment may be needed to prevent steam from leaking through the valve seat at in appropriate times. The selected valve spring exerts a pressure of 162 lbs. when it is compressed to 1.475 inches, which means the steam engine can be run up to about 150 psi of steam pressure (with a safety factor).

Two valves spring bases are needed.

=Drawing=

[[Image:Spec-Valve-Spring-Base.png]]

=Instructions=

'''Materials:'''

* 1.25" steel round stock.

'''Fabrication'''

# Mount the stock in a metal lathe
# Reduce the diameter to 0.240" for 0.250".
# Cut off to a thickness of 0.250"

Finishing is not needed unless very rough.

[[Category:Steam Engine]]