GB 5135.17-2011Automatic sprinkler system - Part 17: Pressure reducing valves (English PDF)

6.1 Appearance quality

6.1.1 The valve should be clearly marked, flat and smooth surface without bumps and scratches processing defects, coating evenly.

6.1.2 The valve should be provided with the outer surface of the permanent signs and symbols which shall comply with the provisions of 9.1.

6.2 Specifications Importers valve nominal diameter of 40mm, 50mm, 65mm, 80mm, 100mm, 125mm, 150mm, 200mm, 250mm, 300mm.

6.3 Rated Operating Pressure Valve rated working pressure should not be less than 1.2MPa.

6.4 Material

6.4.1 body and bonnet shall be not less than the corrosion resistance of cast iron material, seat materials, corrosion resistance can not be less than bronze. The use of seat corrosion below the bronze material, the seating surface for corrosion protection, and should be required to be heated old

7.3 Of the test, the valve and valve seat seal assembly should be no blocking, the seating surface coating should be no loss after the test, and shall conform to 6.6.2, Provisions of 6.7.

6.4.2 Requirements rotating or sliding metal parts shall be bronze, nickel copper alloy, brass, austenitic stainless steel and other corrosion-resistant materials. If the When materials poor corrosion resistance of manufacture, should be added in the relative movement of the bushing member said corrosion-resistant material.

6.5.1 Safety relief valve

6.5.1.1 safety relief valve has a valve, safety relief valve should be provided at the outlet side of the valve, which shall not be less than the nominal diameter 15mm.

6.5.1.2 Safety relief valve discharge pressure should be adjusted, the discharge pressure adjustment range should be at least 0.35MPa ~ 1.38MPa between.

6.5.2 Control Valves

6.5.2.1 Control valve control valve piping set to be a wheel or handle, and should be labeled with the permanent switch direction.

6.5.2.2 When the control valve having a valve control switch, the locking means to be provided to its normal position of use.

6.5.2.3 circulation control valve member should be fabricated with materials corrosion resistance of not less than bronze.

6.5.3 pressure adjusting means Pressure relief valve should be set pressure adjusting means adjusting device should be easy to operate and has measures to adjust the position of locking.

6.5.4 Filter Piping and components and valve control chamber is connected, when it is circulating a diameter less than or equal 6mm, should be set filters, filter mesh The maximum size should not exceed

0.6 times the aperture protection, filters should not be less than 20 times the total area of protected areas.

6.5.5 connection

6.5.5.1 When the valve flange connection, flange connection size, flange sealing surface type and size should be consistent with GB/T 17241.6 Or GB/T 9112 regulations.

6.5.5.2 When the valve using grooved, groove dimensions shall comply with the provisions of GB 5135.11.

6.5.5.3 When the valve threaded connection, connecting thread shall comply with GB/T 7306's.

6.5.6 Diaphragm Using the diaphragm as the sensing element of the valve, the diaphragm of the physical properties of the rubber should meet the requirements in Table 1. Table 1. The physical properties of rubber diaphragm parameters Item Unit Index Tensile strength MPa

6.6.1 Body strength

7.6 according to the method specified in the strength test, the valve should be no leakage and structural damage.

6.6.2 Sealing Performance

7.7 according to the method prescribed seal test, pressure reducing valve and valve seat seal should be no leakage.

6.6.3 Valve strength

7.8 according to the method prescribed strength test carried valve, pressure reducing valve should be no leakage trachoma, damage, permanent deformation and other effects functions.

6.6.4 diaphragm strength Using the diaphragm as the sensing element of the valve, according to the method specified in

7.9 strength test conducted diaphragm, diaphragm valve should be no leakage Leak, tear and other damage affecting functionality.

6.7 Performance Surge According to the test method specified in the regulator

7.10 performance test valve should be working properly, without any jamming or abnormal vibration, pressure Hydrostatic valve lift should not exceed 0.1MPa.

6.8.1 Flow characteristics According to the test method specified in

7.11 for flow characteristics test, valves should be working properly, found the outlet pressure and outlet set pressure Deviation, shall comply with the provisions of Table 2. Table

2 Flow Characteristics deviation classification Setting outlet pressure MPa Found outlet pressure and provided Maximum deviation of pressure Pilot type valve <=0.5 0.05MPa > 0.5 10% of the set pressure outlet Direct Acting <=0.5 0.10MPa >

0.5 outlet set pressure 20%

6.8.2 Pressure Characteristics Press Test Method

7.12 predetermined pressure tests of valve should be working properly, found the outlet pressure and the initial pressure outlet Deviation, speaking for the pilot valve should not exceed 5% of the initial outlet pressure, the direct acting valve it should not exceed the initial 10% of the outlet pressure.

6.9.1 duty cycle

7.13 according to the method prescribed working cycle test during the test valve should be working properly, no abnormal vibration, springs, diaphragms, etc. Action member function properly, without any damage to the function in. After the test according to the test method specified in

7.7 seal test, the test results should be Comply with the provisions of 6.6.2.

6.9.2 Continuous operation According to the test method specified in

7.14 continuous operation test during the test valve should be working properly, no abnormal vibration, flow fluctuations Or destructive cavitation phenomena.

7.1 Visual inspection

7.1.1 eye test sample flag case, the recording mark content.

7.1.2 Check the specimen process uniformity, the presence or absence of the test piece mesh processing defects and mechanical damage.

7.2 Measure With a minimum value of not more than 0.1mm gage measured sample connecting member, flow components and filter size, measuring record data.

7.3 heated aging test The valve assembly is in the closed position, the valve assembly should be subjected to 90d of the servo pressure test using immersion methods or other heating water temperature Maintained at (87 ± 2) °C, after the end of the test, the exhaust valve in the water, cooled to (21 ± 4) °C, check valve and valve seat seals at Seal Happening.

7.4 Test safety relief valve

7.4.1 Connect the safety relief valve inlet and pressurized equipment, slowly add pressure to the safety relief valve outlet side, the water, then the safety relief Inlet pressure relief valve for pressure.

7.4.2 Adjustment safety relief valve, respectively, it is at the lowest and the highest grade in the discharge pressure adjustment range, the actual test at each grade Discharge pressure.

7.5 Diaphragm test According to GB/T 528, GB/T 1690, GB/T 7759, the provisions of HG/T 2580 respectively tensile strength and elongation at break, resistance to liquid Impregnating, compression set, rubber cloth related test, record test data.

7.6 Body strength test

7.6.1 pilot valve, will be equipped with a sample, and do not withstand the pressure of the parts can be used to replace parts or cut off, closing the valve outlet side, into Port side and pressurized device is connected, in the valve open, the pressure was slowly added to four times the rated working pressure relief valve and keep 5min. Check A sample and check the damage leakage.

7.6.2 direct acting valve, will be equipped with a sample, and do not withstand the pressure of the parts can be used to replace parts or cut off, and the valve inlet side Port side are connected with pressurized equipment, valve closed, the valve outlet side filled with twice the specified maximum export enterprises set pressure of the hydrostatic pressure on the inlet side Charged with four times the rated working pressure relief valve hydrostatic pressure to keep leakage damage 5min, check the sample.

7.7 Sealing test

7.7.1 through the control valve means may close or adjust the valve pressure relief valve, the sample was adjusted to the closed state, the sample outlet side Through the atmosphere, the inlet side of pressurized device is connected, the water pressure was slowly added to 2 times the rated working pressure valve to maintain 5min, check the valve seat and the sample Valve leakage at the seals. The outlet side of

7.7.2 shall be designed for filling pressure reducing valve, the sample was adjusted to the closed state, closing the outlet side of the sample and applying the provisions of the Enterprise Small outlet set pressure, the inlet side of pressurized equipment is connected, slowly add pressure to the inlet and outlet of the pressure relief valve to 2 times the rated working pressure Force to maintain 5min, check the case samples boost exports, if the booster seat and valve seal leakage.

7.8 valve strength test Direct acting valve, will be equipped with a good sample, the valve inlet side through the atmosphere, the outlet side of the device connected to pressurized, in the case of the valve is closed , The pressure was slowly added to 2 times the maximum outlet set pressure relief valve and keep 5min. During the test, the sample is damaged Check for leaks Happening.

7.9 diaphragm strength test

7.9.1 pilot valve, will be equipped with a good sample, the valve inlet and outlet side through the atmosphere, an inlet chamber connected to the charge control device, slowly add pressure To 2 times the rated working pressure of the valve hydrostatic pressure, to maintain 5min. During the test, leak check the sample damage.

7.9.2 direct acting valve, according to the test method specified in

7.8 were tested.

7.10 Surge Test

7.10.1 shown in Figure 1, the specimens were correctly installed in the test pipeline.

7.10.2 In the case of open solenoid valve 6, regulating the inlet and outlet control valve control valve 5, so that the test valve inlet pressure is

3 Rated operating pressure, pipeline flow valve of starting flow.

7.10.3 regulating pressure relief valve adjusting device, the outlet pressure at the outlet business setting maximum and minimum predetermined pressure range Changes between consecutive, repeated twice, the recording observe the situation.

7.10.4 guarantee under the rated working pressure of the inlet valve of the premise, slowly closing the outlet valve 5, so that pipeline flow variations from the starting flow 0, Record the outlet pressure, the test was repeated three times, averaged, measured static pressure rise. Explanation. 1

--- inlet control valve; 2

--- inlet pressure gauge; 3

--- test valve; 4

--- outlet pressure gauge; 5

--- outlet control valve; 6

--- solenoid valves; 7

--- solenoid valve control and counting device. Figure 1 valve schematic Comprehensive Test

7.11 Flow characteristics

7.11.1 shown in Figure 1, the specimens were correctly installed in the test pipeline.

7.11.2 In the case of open solenoid valve 6, regulating the inlet and outlet control valve control valve 5, so that the test valve inlet pressure is

3 Rated operating pressure, pipeline flow valve initiating flow adjustment valve, the outlet pressure to export enterprises specified minimum set pressure.

7.11.3 guarantee under the rated working pressure of the inlet valve premise open outlet control valve 5, the pipe flow at a predetermined maximum flow business Varies between 20% to 100% of the amount, at least five groups at different outlet pressure and outlet flow of the set pressure deviation records.

7.11.4 After the completion of the trial, at the starting flow regulator outlet pressure is adjusted to set the maximum outlet pressure on companies to retry Test 7.11.1 ~

7.11.3 regulations.

7.12 Pressure properties

7.12.1 shown in Figure 1, the specimens were correctly installed in the test pipeline.

7.12.2 In the case of open solenoid valve 6, regulating the inlet and outlet control valve control valve 5, so that the test valve inlet pressure is

3 Rated working pressure, maximum flow conduit flow business regulations, while adjusting valve so that the initial pressure of export enterprises specified minimum Outlet set pressure.

7.12.3 maintaining pipeline flow is the maximum flow rate specified in the enterprise, so that the relief valve inlet pressure of 80% to 105% of its rated working pressure Between changes in at least five groups deviation between the measured initial outlet pressure inlet pressure outlet pressure under different recording.

7.12.4 After the completion of the test, the maximum flow rate under a predetermined pressure reducing valve corporate initial outlet pressure is adjusted to a predetermined maximum out enterprise Mouth set pressure, re-test 7.12.1 ~

7.12.3 regulations.

7.13 Duty cycle test

7.13.1 shown in Figure 1, the specimens were correctly installed in the test line.

7.13.2 In the case of open solenoid valve 6, regulating the inlet and outlet control valve control valve 5, so that the test valve inlet pressure is

3 Rated working pressure, outlet pressure for export enterprises to set any value within a predetermined pressure range, and pipeline flow valve most 20% Large Flow.

7.13.3 electromagnetic valve open control and counting device, the solenoid valve is closed to an open loop, to ensure that the test enable or disable the solenoid After the valve to the next cycle after the outlet side pressure is stable, the test 5000.

7.14 Continuous operation test

7.14.1 shown in Figure 1, the specimens were correctly installed in the test line. 7.14.2 6 normally open solenoid valve, control valve regulating the inlet and outlet control valve 5, so that the test pressure relief valve inlet 3 for the rated working pressure Force, the outlet pressure is the minimum export enterprises predetermined set pressure, and pipeline flow valve maximum flow rate of 20%, continuous operation 90min. 7.14.3 6 normally open solenoid valve, control valve regulating the inlet and outlet control valve 5, so that the test pressure relief valve inlet 3 for the rated working pressure Force, the outlet pressure of the largest export enterprises predetermined set pressure, and flow rate of the pipeline valve maximum flow, continuous operation 90min.

8.1.1 Type inspection

8.1.1.1 When one of the following conditions, type of inspection should be carried out.

a) identification of new product trial when stereotypes;

b) After officially put into operation, such as a significant change in processing methods of product structure, materials, processes, the key processes when;

c) the quality of major accidents;

d) Product Discontinuance more than one year, the production recovery;

e) continuous production for three years;

f) quality supervision agency when requested.

8.1.1.2 Product type test items shall be specified in Table 3.

8.1.2 factory inspection Delivery inspection items should include at least the items specified in Table 3. Table 3 type test items, factory inspection items and substandard category Inspection items and contents Type examination Test project Factory inspection project failed category A full inspection sampling Class B Appearance quality (6.1) - - - - - Specifications (6.2) - - - - - Rated working pressure (6.3) - - - - - Materials (6.4) - - - - - structure part Safety relief valve (6.5.1) - - - - - Control valve (6.5.2) - - - - - Pressure adjusting means (6.5.3) - - - - - Filter (6.5.4) - - - - - Connection (6.5.5) - - - - - Diaphragm (6.5.6) - - - - - strength seal Body strength (6.6.1) - - - - - Sealing performance (6.6.2) - - - - - Clapper strength (6.6.3) - - - - - Diaphragm strength (6.6.4) - - - - - Surge Performance (6.7) - - - - - stress reliever performance Flow characteristics (6.8.1) - - - - - Pressure characteristics (6.8.2) - - - - - jobs reliability Duty cycle (6.9.1) - - - - - Continuous operation (6.9.2) - - - - -

8.2 Sampling Method

8.2.1 Type test random sampling in the factory inspection qualified products, the sampling base of not less than four, the number of samples is two.

8.2.2 factory inspection of all seized items subject to examination by one; the sample extraction sampling program as per 20, each batch of random sample Number 2; also 2 sets of extraction when the number of samples is less than 20 units.

8.3 Test Procedure Valve test procedure conducted in accordance with Figure 2. Explanation. 6.1

--- appearance quality;

6.2 specification; 6.3

--- rated working pressure; 6.4

--- Materials; 6.5

--- structural components; 6.6

--- strength of the sealing; 6.7

--- regulator performance; 6.8

--- reduced pressure characteristics; 6.9

--- reliability.

2 Test flowchart of FIG.

8.4 test results to determine