Liquid filter with integral pressure regulator

A liquid filter, comprising a pressure regulator for fuel and provided with a pressure regulator valve;

• and a filter unit including a housing with a filter element located between a dirty side and a clean side of said housing so that fuel flows through said filter element radially from outside inwards, an inflow connector connected to said dirty side of said housing;
• an outflow connector connected to said clean side of said housing, said housing also having a tank connector arranged so that a liquid flowing through said pressure regulator valve flows out of said tank connector upon a response of said pressure regulator;
• a diaphragm forming a movable valve member of said pressure regulator and loaded by a liquid pressure counter to a spring action so as to control said pressure regulator valve, said pressure regulator being connected between said clean side and said tank connector, said diaphragm being formed and arranged so that a liquid stream flowing away to said tank connector flows through an inside of said diaphragm, said diaphragm forming a movable valve member of said valve and controlling a connection from said clean side to said tank connector, said pressure regulator and said tank component being disposed on a same part of said housing, while said inflow connector being also located in the same part of said housing, said diaphragm having a centrally disposed, annular valve seat which cooperates with a valve body fixed to said housing so that said valve seat and said valve together from said valve of said pressure regulator, said housing having a cup-shaped housing part and a one-piece cap secured with said cup-shaped housing part and has a tubular support member on which said filter element is tightly supported, said pressure regulator and said tank connector being disposed coaxially to one another on said cap, said cap having a concentric wall, said diaphragm halving a clamping point which is located on an outer circumference of said diaphragm on said concentric wall of said cap being non-releasably mounted in said cap, said tank connector being located centrally in said cap;
• and an inflow connector located radially outside said clamping point.

A liquid filter, comprising a pressure regulator for fuel with a pressure regulator valve;

• and a filter unit including a housing with a filter element located between a dirty side and a clean side of said housing so that fuel flows through said filter element radially from outside inwards;
• and inflow connector connected to said dirty side of said housing, an outflow connector connected to said clean side of said housing;
• said housing also having a tank connector arranged so that a liquid flowing through said pressure regulator valve flows out of said connector upon a response of said pressure regulator;
• a diaphragm forming a movable valve member of said pressure regulator and loaded by a liquid pressure counter to a spring action so as to control said pressure regulator valve, said pressure regulator being connected between said clean and said tank connector, said diaphragm being formed and arranged so that a liquid stream flowing away to said tank connector flows through an inside of said diaphragm, said housing having a cup-shaped housing part and a one-piece cap secured with said cup-shaped part and has a tubular support member on which said filter element is tightly supported, said pressure regulator and said tank connector being disposed coaxially to one another on said cap, said cap having a concentric wall, said diaphragm having a clamping point which is located on an outer circumference of said diaphragm on said concentric wall of said cap, said diaphragm being non-releasably mounted in said cap, said pressure regulator and said tank connector being located in a same part of said housing, said inflow connector being also located on said same part of said housing.

A liquid filter, comprising a pressure regulator for fuel with a pressure regulator valve;

• and a filter unit including a housing with a filter element located between a dirty side and a clean side of said housing so that fuel flows through said filter element radially from outside inwards;
• and inflow connector connected to said dirty side of said housing, an outflow connector connected to said clean side of said housing;
• said housing also having a tank connector arranged so that a liquid flowing through said pressure regulator valve flows out of said connector upon a response of said pressure regulator;
• a diaphragm forming a movable valve member of said pressure regulator and loaded by a liquid pressure counter to a spring action so as to control said pressure regulator valve, said pressure regulator being connected between said clean and said tank connector, said diaphragm being formed and arranged so that a liquid stream flowing away to said tank connector flows through an inside of said diaphragm, said housing having a cup-shaped housing part and a one-piece cap secured with said cup-shaped part and has a tubular support member on which said filter element is tightly supported, said pressure regulator and said tank connector being disposed coaxially to one another on said cap, said cap having a concentric wall, said diaphragm having a clamping point which is located on an outer circumference of said diaphragm on said concentric wall of said cap, said diaphragm being non-releasably mounted in said cap;
• and a valve body fixed to said housing, said diaphragm having a centrally located annular valve seat which cooperates with said body and forms together with said body said valve of said pressure regulator.

A liquid filter, comprising a pressure regulator for fuel with a pressure regulator valve;

• and a filter unit including a housing with a filter element located between a dirty side and a clean side of said housing so that fuel flows through said filter element radially from outside inwards;
• and inflow connector connected to said dirty side of said housing, an outflow connector connected to said clean side of said housing;
• said housing also having a tank connector arranged so that a liquid flowing through said pressure regulator valve flows out of said connector upon a response of said pressure regulator;
• a diaphragm forming a movable valve member of said pressure regulator and loaded by a liquid pressure counter to a spring action so as to control said pressure regulator valve, said pressure regulator being connected between said clean and said tank connector, said diaphragm being formed and arranged so that a liquid stream flowing away to said tank connector flows through an inside of said diaphragm, said housing having a cup-shaped housing part and a one-piece cap secured with said cup-shaped part and has a tubular support member on which said filter element is tightly supported, said pressure regulator and said tank connector being disposed coaxially to one another on said cap, said cap having a concentric wall, said diaphragm having a clamping point which is located on an outer circumference of said diaphragm on said concentric wall of said cap, said diaphragm being non-releasably mounted in said cap;
• a sleeve-shaped profiled seal, said pressure regulator having a substantially tubular support with one end which is tightly secured to said cap and with another end supporting said filter element through said sleeve-like profiled seal;
• and a valve body fixed to said housing, said diaphragm having a movable valve seat, said valve body being located in said tubular Support and together with said movable seat forming said valve, said support element being provided with flow openings formed so that a liquid from said clean side acts upon said diaphragm on its side located upstream of said valve, said tubular support being tightly secured together with an outer edge of said diaphragm in said clamping point.