A needle valve normally refers to an upstream second stage demand valve, Nothing that you will find in the first stage.
The push pin that I am referring to normally links the high pressure diaphragm to the first stage valve seat. If you can look inside the LP ports, you may be able to see the pin I am referring to. In most regulator of that era it is about 0.06 inches in diameter.
As I mentioned, I am not particularly familiar with Sportways single hose regulators, but I serviced most of the other brands that were available in the 70’s (including many earlier models) and all the diaphragm first stages were very similar. From the outside that one looks like some of the others.
The Sportways double hose regulator used a cone shaped valve seat very similar to the Heathway’s DH, and I suspect that first stage probably uses the same components as their DH first stage.
Note: the early diaphragm regulator first stages in the 60's were not balanced, the IP goes up as the tank pressure goes down. That one looks like it is probably a non-balanced first stage.
The push pin that I am referring to normally links the high pressure diaphragm to the first stage valve seat. If you can look inside the LP ports, you may be able to see the pin I am referring to. In most regulator of that era it is about 0.06 inches in diameter.
As I mentioned, I am not particularly familiar with Sportways single hose regulators, but I serviced most of the other brands that were available in the 70’s (including many earlier models) and all the diaphragm first stages were very similar. From the outside that one looks like some of the others.
The Sportways double hose regulator used a cone shaped valve seat very similar to the Heathway’s DH, and I suspect that first stage probably uses the same components as their DH first stage.
Note: the early diaphragm regulator first stages in the 60's were not balanced, the IP goes up as the tank pressure goes down. That one looks like it is probably a non-balanced first stage.
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