Dn250-1300 Horizontal And Vertical Turbine Pressure Regulating
Turbine Contro Valve For HPP
1. Kaplan turbine generators series.
2. Turgo turbine generators series.
3. Tubular turbine generators series.
4. Francis turbine generators series.
5. Pelton turbine generators series.
6. Hydropower plant supporting equipment.
Pressure regulating valve is long pressure diversion tunnel of a
hydropower station safety equipment, in general, when the pressure
water diversion pipe Σ LV/H is more than 15 ~ 30, to set up the
surge tank, due to large surge tank construction quantities, the
construction period is longer, the pressure regulating valve
instead of surge tank, can save investment, shorten the
The control system of the TFW type pressure regulating valve adopts
full hydraulic control and operation, and simultaneously controls
and operates the vane servo and pressure regulating valve through
components such as special main pressure regulating valves
installed in the governor. The working principle is as follows:
1. When the unit load is constant, the main pressure valve piston
is in the middle position, and the pressure oil P1 from the
governor enters the main cylinder closed chamber of the pressure
regulating valve through the orifice A. At this time, the pressure
regulating valve closes the chamber oil pressure P1. =P2, which
opens the chamber to drain the oil. Since the oil pressure in the
closing chamber is greater than the water thrust on the valve disc
of the pressure regulating valve, the pressure regulating valve is
in the closed position.
2. When the unit reduces the load (about 15% of the rated
output of the unit), since the upward displacement of the piston of
the intermediate valve disc of the main pressure regulating valve
is less than the overlap amount S, only a small amount of pressure
oil P1 passes through the orifice at this time. A enters the vane
servo to close the chamber and slowly closes the vane. At this
time, the pressure drop ΔP formed by a small amount of pressure oil
through the hole A is small, and the oil pressure (P2=P1-ΔP) of the
pressure regulating valve closing chamber can still be The pressure
regulating valve is kept in the closed position. At this time, the
pressure regulating valve opens the chamber to drain the oil.
Therefore, when the load reduction amount is small, the pressure
regulating valve does not operate, and the vane servomotor has a
slow closing speed.
3. When the unit instantaneously smashes more load (greater than
about 15% of the rated output of the unit), the upward displacement
of the piston of the intermediate valve disc of the main pressure
regulating valve is greater than the overlap amount S, and the
differential pressure ΔP on both sides of the orifice increases. ,
P2 is reduced, and the pressure cylinder main cylinder opening
chamber is connected with the pressure oil P1, the pressure
regulating valve is quickly opened, the pressure regulating valve
closes the pressure oil discharged from the chamber and a small
amount of pressure oil flowing through the A hole is closed to the
vane servomotor. The lumen quickly closes the vanes. Thanks to the
same main pressure regulating valve control, the quick opening of
the pressure regulating valve and the quick closing of the vane are
4.When the unit increases the load, the main pressure regulating
valve piston moves down, the pressure oil P1 directly enters the
vane servo opener opening chamber (not restricted by the A hole),
the pressure before and after the A hole is equal, and the pressure
regulating valve closes the chamber oil pressure. No change, the
opening chamber is drained, so the pressure regulating valve is
still in the closed position.
5."Segmentation device": When the pressure regulating valve starts
to open quickly, the oil discharge of the guide cylinder is rapidly
restricted by the restriction of the orifice C, forcing the oil
pressure check valve to open against the oil pressure, so During
the rapid opening of the pressure regulating valve, the pressure
oil in the closing chamber only partially closes the vane servo,
while the other small amount of pressure oil is continuously
drained through the regulating valve D, so that the opening speed
of the regulating valve is higher than that of the "segmenting
device" "It is speeded up when it is not put in. When the
regulating valve is opened to the position limited by the limit
ring and stopped (when the vanes are not fully closed at this
time), the oil pressure of the pilot cylinder disappears, and the
oil pressure check valve automatically closes automatically. At
this time, only a small amount of pressure oil passing through the
A hole slowly continues to close the vane servo, so that the vane
is closed in two stages, so the size of the opening of the
regulating valve D can directly control the inflection point
position of the vane segment closing. After the guide vane is
closed, when the unit speed is reduced to the normal speed, the
main pressure regulating valve returns to the middle position, and
the main cylinder of the pressure regulating valve opens and drains
the oil, so that the pressure oil P1 closes the pressure regulating
valve at a predetermined speed through the A hole.
Q1, Which turbine should I choose?
Please tell me the water head, flow rate, frequency, Total power
, voltage, on grid or off grid operation, we will propose a
Q2, Can your factory provide all the equipment for hydropower
Yes, we can provide you with turbines, hydro-generators, pressure
regulators, turbine wheels, control panels, transformers,
monitoring systems and more.
Q3, Can you do EPC for a hydroelectric power plant?
Yes, we can provide TURN-KEY and EPC services including
measurement, design, manufacturing, construction, manufacturing,
commissioning, inspection, maintenance runner replacement and
turbines/generators including bearings, seals For parts and key
parts, we will send technicians and workers to install equipment.
Q4,Is your company a trading company or a manufacturer?
We are a manufacturer of hydro turbine generators and started to
promote the international market in 2013. Our factory is located in
Sichuan, where China's water conservancy and hydropower is most
developed. Welcome to visit our factory in China.
Q5, What is an acceptable MOQ?
For this product, our acceptable MOQ is 1 set.
Q6,How long is the delivery time?
Delivery times range from 15 days to 6 months depending on the
model you are purchasing.
Q7,Does your company have its own independent official website?
Of course, and we can see more information about our company and
products on our official website.
website address: www.fstgenerator.com