ANSI CSA AM Z21.15A-2012 CSA 9.1A-2012 Manually Operated Gas Valves For Appliances Appliance Connector Valves And Hose End Valves (Addenda to the Second Edition).pdf

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1、ANSI Z21.15a-2012CSA 9.1a-2012(reaffirmed 2014)Addenda to the Second Edition ofANSI Z21.15-2009/CSA 9.1-2009American National Standard/CSA Standard for Manually Operated Gas Valves For Appliances, Appliance Connector Valves And Hose End ValvesStandards DeveloperAPPROVEDCSA AMERICA INC. 8501 East Ple

2、asant Valley RoadCleveland, Ohio 44131CANADIAN STANDARDS ASSOCIATION5060 Spectrum Way, Suite 100Mississauga, Ontario, Canada L4W 5N6Published - February 2012Copyright 2012Canadian Standards AssociationPermission is granted to republish material herein in laws or ordinances, and in regulations, admin

3、istrative orders, or similar documents issued by public authorities. Those desiring permission for other republication should consult Canadian Standards Association, 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6.Copyright 2012CSA America, Inc.Permission is granted to republish m

4、aterial herein in laws or ordinances, and in regulations, administrative orders, or similar documents issued by public authorities. Those desiring permission for other republication should consult CSAAmerica, Inc., 8501 East Pleasant Valley Road, Cleveland, Ohio 44131.PrefaceThe standards set forth

5、herein apply to the second edition of the Standard for Manually Operated Gas Valves for Appliances, Appliance Connector Valves and Hose End Valves, ANSI Z21.15-2009 $ CSA 9.1-2009, and supersede corresponding standards therein. Following their preparation by the supervising Technical Advisory Group,

6、 they were accepted by the American National Standards Institute (ANSI) and the Interprovincial Gas Advisory Council (IGAC), and subsequently approved.NOTE: Changes, other than editorial, are denoted by a vertical line in the margin.February 23, 2012American National Standards Institute, Inc.Decembe

7、r 29, 2011Interprovincial Advisory Council Effective in Canada August 1, 2013IGAC1Addenda to American National Standard/CSA Standard For Manually Operated Gas Valves For Appliances, Appliance Connector Valves And Hose End ValvesPartI: Construction 1.2 General1.2.2The manufacturer shall specify the f

8、ollowing information:a. Type of valve or device (see Part IV, Definitions);b. Maximum and minimum ambient temperature;c. Capacity (separate capacities may be furnished for both settings of a universal gas burner valve);d. Low-setting throughput(s), if applicable (separate throughputs may be furnishe

9、d for both settings of a universal gas burner valve); ande. Whether or not the valve has a non-displaceable member.1.6 Valve Stop And Latches1.6.3A valve having an intermediate “off” position between two “on” positions shall be so constructed that it will become latched in the “off”position. A unive

10、rsal gas burner valve shall have integral provisions to show that only one “off” position exists when the valve is adjusted for each of the selected gas settings.1.6.4Latching type valves shall be capable of withstanding the following torques applied against the latching means without damage, which

11、could result in the unseating of the valve member, and on a universal gas burner valve, resulting in a change in gas setting.21.8 Universal Gas Burner ValvesA universal gas burner valve shall be designed so that it can be changed from one gas setting to another gas setting with no intermediate setti

12、ngs and without addition, deletion, or substitution of parts. Changing from one gas setting to another shall require the use of a tool. (Current 1.8, Strength, through 1.10, Assembly, become 1.9 through 1.11, respectively, unchanged.)1.12 InstructionFor a universal gas burner valve, the manufacturer

13、 shall provide printed instructions and diagrams (intended for the OEM appliance manufacturer) for the proper method of switching the valve from one gas setting to the other.1.13 Marking1.13.7A universal gas burner valve shall be clearly marked at each position to indicate the gas that the valve is

14、set to control. Abbreviations may be used: for example, “Nat” for natural gas and “LP” for propane gas. This marking shall be visible during the act of switching from one gas to the other and shall be incorporated on the valve. 1.13.8The markings specified in 1.13.1 and 1.13.3 through 1.13.7 shall b

15、e securely affixed to the valves and shall meet the following specifications. 1. All metal marking materials shall be rustproof; 2. All markings shall be suitable for application to the surfaces upon which applied; and3. Shall demonstrate suitable legibility as specified under 2.10 Marking Material

16、Adhesion and Legibility.Torque,Inch-Pounds (N!m)Valves of pipe sizes less than 3/8in (9.53 mm), and valves having unthreaded inlets 50 (5.65)Valves of pipe sizes 3/8in (9.53 mm) and larger having threaded inlets 100 (11.30)3Part II: Performance2.2 LeakageA manual valve shall not leak in excess of 2.

17、62 in3/hr (20 cm3/hr) of air corrected to 30 in Hg (101.3 kPa) pressure at 60F (15.5C).Method of TestThis test shall be conducted at the manufacturers specified maximum ambient temperature.Valves incorporating a flow adjustment screw shall be tested for leakage with the adjustment screw in any norma

18、l adjustment position from completely closed to that permitting the maximum rate of gas flow, and with the cap, plug, lock nut, or other concealment or sealing means, if provided, tightly in place.Five new samples of each type of valve shall be subjected to this test, all of which shall comply.A val

19、ve incorporated in a control having a bypass around the valve shall be tested under this provision with the bypass sealed by any convenient means.Each universal gas burner valve sample shall be tested for leakage when set to deliver each gas (i.e. Natural gas setting and LP gas setting). The inlet o

20、f the valve under test shall be connected to a pneumatic system capable of supplying clean dry air at the test pressures and to a flow measuring device capable of accurately indicating the allowable flow. The flow measuring device shall be located between the air supply and the inlet of the valve.Th

21、e valves shall be placed in a test oven and heated to the manufacturers specified maximum ambient temperature 5F ( 2.8C), as indicated by a thermocouple attached to one of the valves. The valves shall be maintained at this temperature for one hour and throughout the remainder of this test.With the v

22、alve closed and with the outlet open, air shall be admitted and maintained at a pressure of 2.0 in wc (498 Pa) until equilibrium conditions are attained, after which the leakage shall be measured. The pressure shall then be increased slowly to 3 psi (20.7 kPa) and maintained at that pressure until e

23、quilibrium conditions are attained, after which the leakage shall again be measured.The above tests shall be repeated with the valve open and with the outlet sealed. The leakage rate under any test condition shall not exceed 2.62 in3/hr (20 cm3/hr) of air corrected to standard conditions of 30 in Hg

24、 (101.3 kPa) pressure and 60F (15.5C).The above test shall be conducted at 3/4psi (5.17 kPa) rather than at 3 psi (20.7 kPa) for a manual valve where the inlet gas pressure cannot act to reduce the seating force of the valve member.2.3 Capacity2.3.1Pilot shut-off valves, pilot shut-off devices and p

25、ilot adjustment valves need not comply with this provision.4The capacity of a valve shall not be less than that specified by the manufacturer. For a universal gas burner valve, the valve shall comply with the requirements of this test with the valve set to deliver each of the applicable gases. Capac

26、ity shall be determined by the quantity in Btu/hr (kW) of a 0.64 specific gravity, 1000 Btu/ft3(37.3 MJ/m3) gas which can be passed with a pressure drop equal to 0.3 in wc (74.7 Pa).Method of TestThis test shall be conducted at room temperature.Standard weight pipe of proper size reamed to remove bu

27、rrs caused by cutting shall be fitted to the inlet and outlet connections of the valve. The straight run of pipe before and after the valve shall be of a length not less that 10 pipe diameters (I.D.). Two short lengths of pipe or metal tubing shall be soldered to the pipe, one before the inlet and t

28、he other after the outlet connections. These pressure tappings shall be located 5 pipe diameters (I.D.) from the inlet and outlet connections. A drill shall be inserted in the short length of pipe or metal tubing and a hole drilled through the wall of the large pipe, care being taken to remove any b

29、urrs caused thereby. The two pressure tappings shall be connected to a differential pressure gauge which may be read directly to at least 0.01in wc (2.5 Pa) pressure.Either gas or air may be used for the test. If gas is used it shall be vented or burned as far away from the valve, test meter and oth

30、er instruments as will preclude the heating of such equipment. The gas rate shall be adjusted to give an indication on the gauge approximately equal to the pressure drop specified above, and the necessary observations made and recorded. Observations may be made at a number of different pressure drop

31、s.The capacity of the valve shall be calculated using the following formula:or, sincethenwhereK = 2860 for U.S. customary units (189.393 for metric units);qsc= capacity with gas of 1000 Btu/ft3(37.2 MJ/m3) and 0.64 sp. gr. saturated with water at 60F (15.5C) and 30 in Hg column (101.3 kPa) at which

32、a pressure drop of 0.3inch equivalent water column (74.7 Pa) occurs, Btu/hr (kW);Q1= quantity of test gas (or air) as metered, ft3/hr (m3/hr);sp gr1= specific gravity of dry test gas (or air) referred to dry air as 1.0;ttsc 1ttPxspgrqKQpd x 1t 2tttspgr P at at spgrspgrPP1t 2sc 1ttspgr P at at spgrqK

33、Qpd x5sp grt= corrected or actual specific gravity of test gas (or air) as metered;Pt= absolute pressure of test gas (or air) as metered, in Hg column (kPa);at = aqueous tension of water vapor in test gas (or air), in Hg column (Pa);sp gr2= 0.62 = specific gravity of water vapor referred to dry air

34、as 1.0;pdt= observed pressure drop (corrected for difference in velocity head, if any, due to change of area at points tappings are taken), in wc (Pa); andt = temperature of test gas (or air) as metered, F absolute (C).When the inlet and outlet connections of a valve differ in size, the observed pre

35、ssure drop shall be corrected for the change in velocity pressure using the following formula:where:The velocity head, in wc (Pa), at the inlet tapping (hv1) or outlet tapping (hv2) is found by the following formula:andC = 1.0335 x 10-5for U.S. customary units (2.1923 x 10-10for metric units);Q1= qu

36、antity of test gas (or air) as metered, ft3/hr (m3/hr);sp grt= corrected or actual specific gravity of test gas (or air) as metered;pdo= pressure drop (may be negative) between inlet and outlet pressure tappings on manifold as observed, in wc (Pa);D = inside diameter of pipe at inlet or outlet press

37、ure tapping, in (mm);P = absolute pressure of test gas (or air) at inlet or outlet pressure tapping, in Hg column (kPa); andt= temperature of test gas (or air) as metered, F absolute (C).2.4 Continued OperationUniversal gas burner valve samples shall comply with these requirements with the samples s

38、et to deliver one of the applicable gases. At the conclusion of the test, if the wear pattern of the internal parts is different for each gas setting, the valve samples shall be switched to the other gas setting and the continued operation test shall be repeated.to12pd pdhvhv 21tv4tCxQ xPxspgrhD62.4

39、.3Valves having predetermined reproducible low settings shall be capable of maintaining the initial flow setting.Method of TestThis test shall be conducted at room temperature.One of the valves tested under 2.4.1 may be used for this test.A valve having a fixed low setting shall be tested as receive

40、d. If the low setting is adjustable, the valve shall be adjusted to provide a throughput at the low setting within 5 percent of the manufacturers specified value using butane gas at 11.0 in wc (2.74 kPa) pressure.A valve having adjustable stops for controlling the low setting shall have these stops

41、set with a torque of 15 inch-pounds (1.69 N$m). Such a valve shall then be cycled 100 times at room temperature against the stops with a torque of 10 inch-pounds (1.12 N$m). The throughput at the low setting shall then be rechecked and shall be within 20 percent of the initial adjustment.The valve s

42、hall then be cycled with the other valves as described under 2.4.1. After 2000 cycles, and at completion of the cycling test, the throughput at the “low” setting shall be rechecked and shall be within 20 percent of the initial adjustment. In each case the rotative position for checking the “low” set

43、ting shall be indicated by the particular valve construction, whether by an adjustable rotative stop, a “click,” detent or other indicating means.The universal gas burner valve sample shall be tested for compliance with this provision when set to deliver each gas (i.e. Natural gas setting and LP gas

44、 setting). If the wear pattern of the internal parts is different for each gas setting and 2 cycle tests are required, then separate tests shall be performed with the valve set to deliver each gas (i.e. one complete cycle/low setting test with the valve set to Natural and one complete cycle/low sett

45、ing test with the valve set to LP). If the wear patterns are the same for each setting and only one cycle test is needed, the “low” setting requirements shall be checked at both gas settings in the as received condition, after 2000 cycles and at the conclusion of cycling.7Part IV: DefinitionsVALVE,

46、MANUALLY-OPERATED GAS - A valve that permits control of the flow of gas from an “off” to an “on” position by means of hand operations (manual control). Some specific types are:1. Appliance Main Gas Valve. A manually-operated gas valve used as part of an appliance for turning the main burner gas (or

47、main burner and pilot gas) on and off. The valve is turned on when the appliance is put into service and turned off to shut the appliance down;2. Gas Burner Valve. A manually-operated gas valve used as part of an appliance which requires user initiation of each usage cycle. The valve is turned on wh

48、en the appliance usage cycle is initiated and turned off when the appliance usage cycle is completed;3. Universal Gas Burner Valve. A gas burner valve for use in outdoor gas appliance applications with provisions for two gases having different heating values which can be changed from one gas setting

49、 to another gas setting with no intermediate selection settings and without the addition, deletion or substitution of parts. A universal gas burner valve requires no physical interaction with the appliance burner orifices to facilitate the changing from one gas setting to the other and has integral provisions to ensure only one “off” position exists when adjusted for each of the selected gas settings. 4. Appliance Connector Valve. A manually-operated gas valve having a non-displaceable valve member, a minimum specified capacity (code mar