Basic Info.
Standard
DIN/BS/Cj/T219/GB5135.17
Certification
CCC, RoHS, ISO, CE
Certificate
Material Certificate 3.1,Ce Certificate
Quality Control
100% Inspection and ISO9001 Quality Control System
Transport Package
Sea Worthy Plywood Box
Specification
DN40 to DN1200
Product Description
Product Description
Pressure reducing valveThis valve is designed and manufactured by our company according to the advanced product of the same type in the United States, France and China.
The valve body adopts the streamlined design with less internal head loss and large flow. The transmission mode adopts the hydraulic operation, and the
pipeline pressure is used to automatically control the up and down movement of valve disc, control the valve opening, and adjust the downstream pressure
, so as to maintain the downstream pressure above the pilot valve spring set value. When the downstream pressure exceeds the set value, the valve will shut
down automatically, and guarantee the constant outlet pressure.The product is the ideal product used for domestic water, fire system and water supply system.
2. Structural
The valve consists of the main valve, pilot valve, needle valve, ball valve, micro filter and pressure gauge etc. The pilot valve, needle valve, ball valve and
pressure gauge are connected to the main valve with pipe, so it is collectively called as the pipe control system, as shown in the below picture.
1. Needle valve; 2. Pressure reducing valve; 3. Ball valve
3. Main specification
Our pressure reducing valve drawing is as below
4. Main dimension| Main Dimension | DN | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 |
| L | 205 | 205 | 250 | 250 | 320 | 415 | 415 | 500 | 605 | 690 | 787 | 787 | 864 | 914 | 1067 |
| H1 | 112 | 115 | 128 | 147 | 174 | 214 | 224 | 287 | 336 | 402 | 480 | 510 | 598 | 669 | 754 |
| Control Flow | Min | 0.5 | 0.55 | 1 | 1.2 | 2.9 | 8.5 | 9.2 | 15 | 28 | 45 | 78 | 117 | 210 | 336 | 490 |
| Max | 21 | 37 | 46 | 50 | 95 | 170 | 230 | 360 | 800 | 1090 | 1402 | 1870 | 2316 | 2829 | 4030 |
The pressure P1 enters the control room of main valve through pipe and needle valve 23 (see the chart), and establishes the downward pressure P3. The
outlet pressure P2 can act on the diaphragm of pilot valve 22 through the pipe and conflict with the adjustment spring of pilot valve. When the downstream
pressure exceeds the pilot valve spring set value, the pilot valve will be closed, the water discharge in the control chamber is 0, and the variable pressure F3
reaches the maximum value, and the main valve pressure seat valve is closed tightly. When the downstream pressure is less than the pilot valve spring set
value, the pilot valve will open, and the water discharge in the control chamber will pass downstream through the pilot valve 22 and ball valve 19. The needle
valve opening is small (1/4-1/2), and the inlet duct is smaller than the outlet duct in the diameter, so the discharge speed is greater than the inlet pressure filling
speed, thus the pressure F3 in the control room is reduced, and the inlet pressure P1 acts on main valve disc 23 and raises it, so as to open the decompression valve.
In the steady regulation state, the discharge flow is equal to the filling flow, the main valve opening is unchanged, and the downstream pressure is stable.
6. Installation and adjustment
1. The optimal installation of main valve is horizontal installation with pump cover up. Other installation methods can also realize the use function, and it is
necessary to thoroughly remove the sundries in the pipe before installation. Pay attention to the flow direction arrow on the main valve body, and follow the
correct direction. Ensure that no pipe stress is on the valve body and internal parts after installation.
2. Before the installation of main valve, a gate valve and a filter should be installed, and a gate valve should also be installed behind the main valve for repair.
3. Regularly clean the micro filter 24 on the main valve.
4. Thoroughly flush the pipe before filling water.
5. Install the bypass-valve for important water pipe
6. Pressure regulation method
1) Close the upstream isolation valve, open the downstream isolation valve for decompression, and lower the downstream pressure below 0.1MPa, and close
the downstream isolation valve;
2) Rotate the pilot valve adjusting screw to the top position;
3) Open the upstream isolation valve slowly;
4) Tighten the pilot valve adjusting screw down, and the outlet pressure will gradually rise, and lock the adjusting screw until reaching the set value;
5) Under the excessive pressure regulation, adjust from the first step; that is, adjust from low to high pressure.
Installation drawing of 200X pressure reducing valve
1, 4, 5: resilient seat gate valve; 2. strainer; 3. 200X pressure reducing valve; For more details,please contact us .
Our Process for Pressure reducing valve production is as below
We Produce our product strictly according to ISO9001 quality control system,and we have WRAS ,DVGW, ,ISO14001 certificate for powder,and WRAS certificate for EPDM gasket.Photos as below are for your reference
our Package is sea worthy polywood box or pallet,photos are as below
We control our quality according to ISO9001 ,photos as below is for your reference
welcome your enquiry ,we will do our best to support.
Address:
No. 139 Wuxing Road, Shibei District, Qingdao City, Shandong Province, China
Business Type:
Manufacturer/Factory
Business Range:
Construction & Decoration, Industrial Equipment & Components, Instruments & Meters, Manufacturing & Processing Machinery
Management System Certification:
ISO 9001, ISO 14001
Company Introduction:
Our company offers ductile iron pipe fitting, ductile iron pipe joint(dismantling joint, coupling, flange adaptor, saddle, quick flange adaptor, restrained flange adaptor for PE pipe, repair clamp etc) and ductile iron valves. We adhere to the management principles of "quality first, customer first and credit-based" since the establishment of the company and always do our best to satisfy potential needs of our customers. Our company is sincerely willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with anirresistible force.
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