The difference between these two kinds of products, mainly lies in the
control valve needs both external sources such as power supply or air),
and the need to do driver can accept foreign control instrument signal
to change in the valve closure pieces of relative positions, so as to
realize the change fluid flow. And self-reliance type pressure regulator
is neither need foreign energy, and does not need to accept foreign
control instrument signal, only by being transported media pressure
signal, can achieve pressure to adjust.

Paddle type pressure regulator characteristics due to paddle type
pressure regulator without outside drive energy, so the product