DA Aqua-Master/Royal Aqua-Master difference?
Posted: Thu Aug 23, 2007 12:49 pm
The difference between the two is only the first stage and if they are replaced, the complete first stage has to be replaced. The first stage internal parts are not interchangeable.
The RAM nozzle is 1/10 inch longer than the DA and it had to be done that way to accommodate the spring block and the potential extra travel of the seat.
The spring block in the DA is just that, a stationary spring guide, nothing else.
In the RAM the spring block is the low pressure balancing chamber for the seat. It is also not stationary. It is floating between two springs to accommodate the extra travel allowed to the seat.
Other balanced diaphragm regulators do not use a floating spring block, but they then would require a deeper balancing chamber and perhaps longer stem on the back of the seat, in order to allow a stroke long enough for improved air flow.
In the case of the RAM the seat stroke was accomplished by using what can be called as a telescoping mechanism.
The springs on both regulators are also probably different spring constants, but perhaps in this application it may not be very critical. I am not sure.
Putting a RAM seat and spring block/ balancing chamber in a DA nozzle without the rear spring, IMHO, is a bad idea. It may seem like it works, but I am almost positive that the seat will bottom out and in the best case it will restrict the flow rate, worst case it could possibly jam...Luis Heros
The RAM nozzle is 1/10 inch longer than the DA and it had to be done that way to accommodate the spring block and the potential extra travel of the seat.
The spring block in the DA is just that, a stationary spring guide, nothing else.
In the RAM the spring block is the low pressure balancing chamber for the seat. It is also not stationary. It is floating between two springs to accommodate the extra travel allowed to the seat.
Other balanced diaphragm regulators do not use a floating spring block, but they then would require a deeper balancing chamber and perhaps longer stem on the back of the seat, in order to allow a stroke long enough for improved air flow.
In the case of the RAM the seat stroke was accomplished by using what can be called as a telescoping mechanism.
The springs on both regulators are also probably different spring constants, but perhaps in this application it may not be very critical. I am not sure.
Putting a RAM seat and spring block/ balancing chamber in a DA nozzle without the rear spring, IMHO, is a bad idea. It may seem like it works, but I am almost positive that the seat will bottom out and in the best case it will restrict the flow rate, worst case it could possibly jam...Luis Heros