Adjustable valve

An adjustable valve, said valve comprising:

• a first housing part with one or more fluid entry openings and one or more fluid exit openings, wherein the first housing part defines a first chamber with the one or more fluid entry openings being configured at a lower part and the one or more fluid exit openings being configured at an upper part of the first chamber;
• a movable throttle member arranged in the upper part of the first chamber for regulating the through flow area of the one or more fluid exit openings in response to a difference in pressure across the throttle member;
• a spring arrangement configured for providing a spring force acting on the throttle member in a direction that increases the through flow area of the one or more fluid exit openings;
• a second housing part defining a second chamber above the diaphragm and the first chamber, with the pressure in the first chamber acting on the diaphragm for increasing the through flow area of the one or more fluid exit openings and the pressure in the second chamber acting on the diaphragm for decreasing the through flow area of the one or more fluid exit openings;
• wherein the spring arrangement comprises at least a first and a second spring;
• and
• wherein the spring arrangement is adjustable to operate in a low pressure mode with the spring force acting on the throttle member being provided by the first spring only, and to operate in a high pressure mode with the spring force acting on the throttle member being provided by at least both the first and second springs.

An adjustable valve, said valve comprising:

• a first housing part with one or more fluid entry openings and one or more fluid exit openings;
• a movable throttle member configured for regulating the through flow area of the one or more fluid exit openings in response to a difference in pressure across the throttle member;
• a spring arrangement comprising at least a first and a second spring configured for providing a spring force acting on the throttle member in a direction that increases the through flow area of the one or more fluid exit openings;
• wherein the spring arrangement is adjustable to operate in a low pressure mode with the spring force acting on the throttle member being provided by the first spring only, and to operate in a high pressure mode with the spring force acting on the throttle member being provided by at least both the first and second springs;
• wherein the first and second springs are compression coil springs placed along the same axis of compression;
• wherein the first spring is positioned for providing a spring force to the throttle member;
• wherein the position of the second spring is adjustable between a low pressure setting, in which the second spring is not providing a spring force to the throttle member, and a high pressure setting, in which the second spring is positioned for providing a spring force to the throttle member;
• the first and second springs have different diameters, and wherein when in the high pressure setting the second spring encompasses the first spring;
• a spindle holding first and second springs supports, wherein the spindle is arranged along the compression axis of the springs with the springs encompassing at least part of the spindle, wherein a bottom part of the first spring is supported by the first spring support and a bottom part of the second spring is supported by the second spring support, and wherein the second spring support can be moved in the axial direction of the spindle for adjusting the position of the second spring;
• and
• wherein the spindle and the second spring support are configured for moving the second spring support by rotating the spindle.