Gate valves and valves. The same should share in the open state of the full flow area and require no short bends of the creek, the controls must not require too much effort. for more
Lines (main lines) and their branches are most commonly used slides,
for pipes of smaller internal widths (lateral lines) gives you the advantage of valves. Embodiments see Fig.
Valve seats and cones are made ​​of hard bronze or stainless steel: valves for return lines sometimes get with leather armouring cone (see illustration).