German FIGAM SA valves, FIGAM SA models, FIGAM SA prices

FIGAM SA valves are valves that reduce the inlet pressure to a required outlet pressure through regulation and rely on the energy of the medium itself to automatically maintain stable outlet pressure. From the perspective of fluid mechanics, a pressure reducing valve is a throttling element with variable local resistance; that is, by changing the throttling area, the flow velocity and kinetic energy of the fluid are altered, causing different pressure losses, thereby achieving pressure reduction. Then, through the adjustment of the control and regulation system, the fluctuation of the pressure downstream of the valve is balanced with the spring force, keeping the downstream pressure constant within a certain error range.

FIGAM SA valve operating principle

The pressure reducing valve reduces water pressure by means of the local resistance of the flow channel inside the valve to the water flow. The range of water pressure drop is automatically regulated by the water pressure difference between the inlet and outlet on both sides of the diaphragm or piston connected to the valve disc. The fixed-ratio pressure reduction principle utilizes the water pressure ratio of the floating piston in the valve body for control; the pressure reduction ratio between the inlet and outlet ends is inversely proportional to the area ratio of the pistons on the inlet and outlet sides. This type of pressure reducing valve operates smoothly without vibration; there is no spring inside the valve body, so there is no concern about spring corrosion or metal fatigue failure. The sealing performance is good with no leakage, thus reducing both dynamic pressure (when water is flowing) and static pressure (when flow rate is 0). In particular, it reduces pressure without affecting the water flow rate. The pressure reducing valve regulates the flow rate of the medium by controlling the opening degree of the closing member inside the valve body, thereby reducing the pressure of the medium. At the same time, it uses the pressure downstream of the valve to adjust the opening degree of the closing member, keeping the downstream pressure within a certain range, and injects cooling water inside the valve body or downstream to reduce the temperature of the medium. This type of valve is called a pressure reducing and desuperheating valve. Kuaiyiyou Automation Selection includes this valve. The characteristic of this valve is that it maintains the outlet pressure and temperature values within a certain range even when the inlet pressure changes continuously.

Precautions for installing FIGAM SA valves

1) Before installing the valve, carefully verify whether the model and specifications of the valve used match the design; 2) Check against the valve model and factory instruction manual to determine if the valve can be applied under the required conditions; 3) When lifting the valve, tie the ropes at the flange connection between the valve body and the valve cover. Do not tie them to the handwheel or valve stem to avoid damaging the valve stem and handwheel; 4) When installing valves on horizontal pipes, the valve stem should be vertical and pointing upwards. Installation with the valve stem pointing downwards is not permitted; 5) When installing the valve, do not use forced alignment connections by pulling or dragging hard, to avoid damage caused by uneven stress; 6) Rising stem gate valves should not be installed in underground damp locations to avoid corrosion of the valve stem.

FIGAM SA valve troubleshooting

In certain pressure reduction control circuits, the outlet pressure of the pressure reducing valve is used to control the pressure of the control oil for electro-hydraulic directional valves or externally controlled sequence valves. After the electro-hydraulic directional valve or externally controlled sequence valve shifts or operates, the flow rate at the outlet of the pressure reducing valve becomes zero, but the pressure must still be maintained at the originally set value. In this case, since the flow rate at the valve outlet is zero, the flow passing through the pressure reduction port is only the pilot flow. Since the pilot flow is very small, generally within 2L/min, the main valve pressure reduction port is basically close to the fully closed position (extremely small opening). The pilot flow exits from the triangular groove or inclined conical surface. If the fit of the main valve spool is too loose or the wear is excessive, the leakage increases. According to the continuity theorem of flow, this part of the leakage must also flow from the damping hole of the main valve spool. That is, the flow through the damping hole consists of two parts: the pilot flow and the leakage. Since the area of the damping hole and the oil pressure in the main valve spring chamber remain unchanged (the oil pressure in the spring chamber is determined by the pre-compression amount of the adjusted pressure regulating spring), an increase in the flow through the damping hole will inevitably cause the oil pressure in the lower chamber of the main valve to rise. Therefore, after the outlet pressure of the pressure reducing valve is set, if the outlet flow is zero, the outlet pressure will rise due to excessive looseness in the fit of the main valve spool or excessive wear.

Weidou Intelligent Technology specializes in selling German FIGAM SA valves, FIGAM SA safety valves, FIGAM SA globe valves, FIGAM SA control valves, FIGAM SA solenoid valves, FIGAM SA ball valves, FIGAM SA proportional valves, FIGAM SA diaphragm valves, FIGAM SA butterfly valves, FIGAM SA hydraulic transmission valves, FIGAM SA check valves, FIGAM SA pressure reducing valves, FIGAM SA relief valves, FIGAM SA sequence valves, FIGAM SA balance valves, FIGAM SA throttle valves, FIGAM SA directional valves. Original imports from Germany. Welcome customers to inquire and order.