Self-Regulating Pressure Reducing Valve is composed of Body, Valve Core, Seat and Diaphragm Spring Actuator. It is an Energy-Saving Products which can adjust the pressure with the power from the medium pressure changes. The applicable medium is noncorrosive liquid, gas and steam. With the advantages of fast opening flow characteristic, flexible action and good sealing performance, tt鈥檚 also being widely used in Petroleum, Metallurgy, Power Station, Light Industry, Building, Food, Machinery, etc. to reduce or automatically control (Outlet Pressure Regulating Type) or Relief (Inlet Pressure Regulating Type) the pressure of the supplying water, gas, steam and other medium.
鈼哠tructure & Working Principle
Self-Regulating Pressure Reducing Valve is mainly composed of Actuator, Control Valve, Condenser and pilot tube, etc. The detailed structure is as Drawing 1.
Drawing 1-a, ZZYP/M -16B Self Operated Outlet Pressure Regulator
1.Liquid-In Joint 2. Air Vent Plug 3. Actuator 4.Liquid-In Tube 5. Gland Screw
6.Condenser 7. Spring 8.Stem 9. Disc 10. Bellow 11. Pressure Adjusting Plate
12.Liquid-Filling Screw 13.Pressure Tapping Tube 14.Outlet Matching Pipe 15. Seat 16.Seat
Drawing 1-a, which is for the pressure controlling of the outlet pressure. Valve action type is Pressure to Close Type. The working principle is as following: The working medium flow into the valve body, and flow out after throttling by the valve disc and valve seat. Some medium flow into the Actuator after cooling by the Condenser( when the medium is steam and act on the diaphragm to make the disc move so as to reduce and sustain the pressure. If the outlet pressure increased, the pressure acted on the diaphragm increased accordingly, and then the compressed spring will make the valve disc move to reduce the valve opening rate until the outlet pressure reduced to the setting value. Vise verse,, when the outlet pressure decreased, the pressure acted on the diaphragm will decrease, and the valve disc will move to increase valve opening rate under the force from the spring until the outlet pressure increased to the setting value.
Drawing 1-b, ZZYP/M-16K Self Operated Inlet Pressure Regulator
2.Liquid-In Joint 2. Air Vent Plug 3. Actuator 4.Liquid-In Tube 5. Gland Screw
7.Condenser 7. Spring 8.Stem 9. Disc 10. Bellow 11. Pressure Adjusting Plate
13.Liquid-Filling Screw 13.Pressure Tapping Tube 14. Inlet Matching Pipe 15. Seat 16.Seat
1. In Drawing 1-b, which is for the pressure controlling of the inlet pressure. Valve action type is Pressure to Close Type. The working principle is as following: The working medium flow into the valve body, and flow out after throttling by the valve disc and valve seat. Some medium flow into the Actuator after cooling by the Condenser( when the medium is steam and act on the diaphragm to make the disc move so as to reduce and sustain the pressure. If the inlet pressure increased, the pressure acted on the diaphragm increased accordingly, and then the compressed spring will make the valve disc move to increase the valve opening rate until the inlet pressure reduced to the setting value. Vise verse,, when the inlet pressure decreased, the pressure acted on the diaphragm will decrease, and the valve disc will move to reduce the valve opening rate under the force from the spring until the outlet pressure increased to the setting value.
鈼哅ain Technical Parameter and Performance of of Self-Regulating Pressure Reducing Valve
1. Main Technical Parameter and Performance
Rated Capacity Coefficient (Kv)3.27112030487512019030048076011001750
Rated Movement (mm)6881010142020254040506070
PN (MPa)1.6, 4.0, 6.4
Medium Temperature (鈩?-25~+350鈩? 鈮?0鈩?nbsp;, with (Condensate apparatus)
Flowing Rate CharacteristicQuick Open
Adjusting Pressure Range15~50, 40~80, 60~100, 80~140, 120锝?80锛?60锝?20锛?20~260, 240~300, 280锝?50, 330~400, 380~450, 430~500锛?80锝?60, 540~620, 600~700, 680~800, 780~900, 880~1000, 600~1500 1000~2500 KPa
Pressure Regulating RatioInlet Pressure / Outlet Pressure = 1.25~10
Flange StandardGB 9113-88GB2555-81(PN64); PN1.6-- RF; PN4.0PN6.4-- FF
Body MaterialZG230-450 ZG1Gr18Ni9Ti ZGIGr18Ni1MO2Ti
Valve Core, Seat, Stem Material
OperationB----Open Type, K-----Close Type
Allowable Leakage L/hMetal Seat (l/h)
Single Seat鈮?0-4*Kv 锛圕lass IV) Double Seat & Sleeve Type鈮?x10-3*Kv(Class II)
Rubber Seat (ml/h)0.150.150.300.300.450.600.901.74.04.06.7511.1011.60
Inlet&outlet Pressure Reduce RatioMax10
2.Pressure Regulating Range
Pressure regulation Range can be referred in the above table. It鈥檚 better to select the setting pressure similar to the average value in that pressure range.
3.Inlet Pressure and Outlet Pressure Chart for Outlet Pressure Regulator
Self Operated Pressure regulator itself is also a regulating system. The valve itself also has pressure drop to some extent, so as for the Outlet pressure Controlling Type, in order to keep the the outlet pressure in a certain range, the inlet pressure should reach to a certain value. The details can be referred as following Chart.
Inlet Pressure (Kpa)3050100150200250300350400450500550600
Inlet Pressure (Kpa)650700750800850900950100012501500200025003000
4.External Dimension & Weight(mm & kg)
Flange Connection Pipe Dimension B383383512512603862862102313801380180020002200
Face to Face Length L150160180200230290310350400480600730850
Pressure Regulation Range (Kpa)15~140H4754755205205407107107808408809159401000
Pilot Tube ScrewM16-1.5
5.Main Parts Material
DiaphragmNBR, EPDM, VITON,
Diaphragm CoverA3 / A4 + PTFE
PackingPTFE, Flexible Graphite
6 Valve Structure Types
Packing Stem Bonnet Guide Disc Seat Body Plug Sleeve
Self Operated Single Seat Pressure Regulator
Self Operated Double Seat Pressure Regulator
Self Operated Sleeve Type Pressure Regulator
7.Valve Working Temperature and Allowable Pressure
Allowable Pressure MPa Working Temperature 掳C C.S. Body S.S Body
鈼咺nstallation, Usage & Maintenance
A. When the valve used for Gas or medium with Low Viscosity with Temperature x鈮?0掳C锛?The valve should be installed like normal Pneumatic Diaphragm Control valve in horizontal pipelines. See Drawing 3
A. ZZYP/M-16B Self Operated Outlet Pressure Regulator
B. ZZYP/M-16K Self Operated Inlet Pressure Regulator
1.Globe Valve 2. Pressure Gauge 3. Filter 4.Self Operated Pressure Regulator 5.Pressure Gauge
B. When the working medium is steam, the self operated valve should be installed inverted with the diaphragm actuator downwards. See Drawing 4.
A. ZZYP/M-16B Self Operated Outlet Pressure Regulator
B. ZZYP/M-16K Self Operated Inlet Pressure Regulator
2.Globe Valve 2&6. Pressure Gauge 3.Filter 4.Self Operated Pressure Regulator
5.Pressure Regulating Valve
C. Notification for Installation
(1). Condenser should be in a higher position than the Actuator but lower than the Pilot Tube, so as to ensure the condenser fulfilled with Condensate Liquid.
(2). There should keep a certain distance between the Pressure Tapping Place and the Pressure Regulator. Generally the distance for the Inlet Pressure Regulator should be greater than 2 times of the Pipe Diameter and about 6 times of the Pipe Dia for the Outlet Pressure Regulator.
(3). For the purpose of easy maintenance and operation, there should be enough space around the Pressure Regulator, the globe valve and manual bypass valve should be also installed before and behind the regulator. See Drawing
DRAWING 5. PRESSURE REGULATOR MANIFOLDS INSTALLATION METHODS
(4). The supporter should be provided when the size of the regulator is bigger than DN100.
(5). The working medium flowing direction should be the same as the Arrow direction on the valve body. The Center point of the Mating Pipes on both ends should be on the same lever as the Center point of valve flanges so as to avoid high pressure for the valve body.
(6). A suitable Strainer should be installed at the inlet of the regulator so as to avoid block caused by the impurities in the medium.
(7). Pressure regulator should be installed with environment temperature -25掳C ~55掳C
A. When the Pressure regulator was applied for Gas or Liquid medium with low viscosity, the operation procedure should be as following : ( See Drawing 3)
(1). Open the Globe valve slowly installed before and behind the regulator.
(2). Unscrew the Actuator Air Vent Plug until the air or liquid flow out through the actuator.
(3). Tighten the Air Vent Plug, and then the regulator can start working. The required Pressure can be set by adjusting the Pressure Regulating Plate. During adjusting process, the operator should observe the pressure value and should act slowly and shouldn鈥檛 let the stem rotate at the same time.
B. When the pressure regulator was applied for Steam, the operation procedure should be as following: ( See Drawing 4)
(1). Remove the Injection Screw from the Condenser.
(2). Unscrew the Actuator Air Vent Plug.
(3). Filled the Actuator with Water through the injection port until the water flow out through the Vent port.
(4). Tighten the Air Vent Plug, fill the actuator with water continuously until the wafer flow out through the injection port.
(5). Tighten the Injection Screw.
(6). Open the globe valve before and behind the regulator slowly.
(7). Adjusting the Pressure Regulating Plate and observe the pressure value until it reaches to the required pressure.
After the Pressure Regulator being used, it won鈥檛 need much maintenance work. The operator should only need to check if the inlet pressure and outlet pressure meet the requirement or not and to check if the Packing Gland and the Actuator leak or not. If leakage occurred, new packing and new diaphragm should be replaced. The normal Problem and maintenance methods are listed in for following Chart ( See Chart 5):
The outlet pressure is not stable, it changed when the inlet pressure changed.1.Valve Disc was Stuck by some impurities.
2.Valve Stem or the Push Rod was stuck.
3.The Liquid-inlet pipe was blocked.1.Dismantle the valve to remove the impurities.
2.Readjusting the pressure
3.Clear the inlet pipe.
The outlet pressure is always higher than the required setting valve and cannot be reduced.1.Setting Spring Stiffness is too big.
2.The selected valve size is too big.
3.The inlet pressure is too high, and the pressure differential of inlet and outlet pressure is too big.
4.Valve Disc, Stem or Push Rod was Stuck1.Replace with new Spring
2.Replace with smaller size valve
3.If the pressure differential of inlet and outlet pressure exceeds 10:1, then two stages pressure reduction should be adopted.
4.Remove the impurities which caused the stuck and readjust the pressure again.
The outlet pressure is always lower than the required setting pressure and cannot be increased1. Setting Spring Stiffness is too small
2. The selected valve size is too small.
3. the pressure differential of inlet and outlet pressure is too small.
4.Valve Stem or the Push Rod was stuck.
5. Valve Disc was Stuck by some impurities.
6.Valve Disc, seat was damaged which caused big leakage.1.Replace with new spring
2. Replace with bigger size valve.
3.If the inlet pressure: Outlet pressure is lower than 1.25, then inlet pressure should be increased.
1.Readjusting the pressure
2.Dismantle the valve to remove the impurities.
3.Re polishing the valve Disc or replace it with new disc
The inlet Pressure or the Outlet Pressure deviate frequently1.Valve size is too big
2.The capacity of the actuator diaphragm chamber is too small1.Replace it with suitable size valve.
2.Add a damper in Liquid-Inlet Pipe.
Customers should present the following information while making an order:
3.Nominal Pressure and Nominal Diameter
4.Signal Pressure Range
5.Valve Action Type:
6.Medium property and working temperature
7.The Max/Normal Minimum Pressure for the Inlet and Outlet
8.The Max/Normal Minimum Flow Capacity
10.Material for the Valve Body/Disc/packing, etc.
鈼哅odel Code methods for Self Operated Pressure Regulator
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DN(mm) Model Structure PN(Mpa) Action
Model: ZZYP--Self Operated Single Seat Pressure Control Valve
ZZYN--Self Operated Double Seat Pressure Control Valve
ZZYM---Self Operated Sleeve Type Pressure Control Valve
Pressure: PN16-PN64, Class 150LB- Class 300LB
Material: Cast Steel, Stainless Steel
Valve Action Type: Outlet Pressure Control( Pressure to Close Type),
Inlet Pressure Control ( Pressure to Close Type)
Working Temperature: 12~ 350掳C
Optional Accessories:: Condenser
Pressure Adjusting Range(Spring Range (MPa)
15-50, 40-80, 60-100, 80-140, 120-180, 160-220, 200-260, 240-300, 280-350, 330-400, 380-450, 430-500, 480-560, 540-620, 600-700, 680-800, 780-900, 800-1000, 600-1500, 1000-2500Self Actuated Control Valve manufacturers
- Created: 24-07-20
- Last Login: 24-07-20