Made from two steel pressings welded together and fitted with a non-return valve, Jackpots are an economical way of achieving " active " support underground at the time of installation-with pre-loads on the mine props of 15-60 tons.
32.
The inner bellows also connects to another non-return valve opening to the outside environment, and thus the gas from the inner bellows is dumped from the circuit in a fixed proportion of the volume of the inhaled breath.
33.
Microsolar comes inclusive of installation fee, brass pressure reducing / relief valves ( where necessary ), non-return valves, highly polished nickel chrome stainless steel casing, triple aluminium sandwich panel with infra-red composite epoxy technology and a seven-year warranty.
34.
Before the umbilical is connected to the helmet or full face mask, the umbilical should be blown through to ensure there is no dirt inside, and the non return valve on the bailout block must be given a function test.
35.
The design allowed the pump structure to be concentric and therefore inherently strong and upon closure of the valve, permits efficient water delivery by acting in line with the supply via a second smaller venturi effect delivery non return valve.
36.
The addition of anti-sink added 2 non-return valves and an extra accumulator so that when hydraulic pressure was lost the valves would close and keep the remaining fluid in the system, and leaving the car resting at a normal height when parked.
37.
This hose leads to a fitting through the front of one thigh of the suit, either with a screw-down outlet valve ( P-valve ), opened for use, or a non-return valve to prevent water from flowing back in if the hose gets disconnected.
38.
If there is an excess beyond the capacity of the fully expanded bellows, as will occur if the gas expands due to a decrease in ambient pressure during ascent, the excess gas will simply pass out through the inner counterlung's non-return valves to the surroundings.
39.
The preferred method of firewater containment is to use pneumatic bladders / drain stoppers that block the outflow from the drain or pneumatic non-return valves both of which can convert the drains into containment vessels from which the firewater can be pumped away into tankers for safe disposal.
40.
The new features were a wedge shaped venturi that closes automatically if the boat grounds or hits an obstruction, and a flap that acts as a non return valve to minimise water coming in if the boat is stationary or moving too slowly for the device to work.
