{"id":326,"date":"2023-11-14T11:12:10","date_gmt":"2023-11-14T16:12:10","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/chapter\/regulator-categories\/"},"modified":"2024-01-09T17:32:55","modified_gmt":"2024-01-09T22:32:55","slug":"regulator-categories","status":"web-only","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/chapter\/regulator-categories\/","title":{"raw":"Regulator Categories","rendered":"Regulator Categories"},"content":{"raw":"<div class=\"regulator-categories\"><p class=\"import-Normal\">There are four categories of pressure regulators as defined in the CSA B149.1 Natural Gas and Propane Installation Code:<\/p><ul><li>Service regulators<\/li><li>Appliance regulators<\/li><li>Line pressure regulators<\/li><li>High pressure regulators<\/li><\/ul><h2>Service regulators<\/h2><p class=\"import-Normal\">Service regulators are installed on a service line to reduce the gas pressure to the desired building pressure. The Natural gas meter sets are provided with a service regulator (Figure 14), which is installed by the gas utility rather than the gasfitter. <\/p><p class=\"import-Normal\"><span style=\"margin-left:26pt\"\/><img src=\"#fixme\" width=\"16.896062992126px\" height=\"72.96px\" alt=\"image\"\/><br\/><img src=\"#fixme\" width=\"137.472020997375px\" height=\"56.8px\" alt=\"image\"\/>Service regulator<br\/><img src=\"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-content\/uploads\/sites\/998\/2023\/11\/image19.jpeg\" width=\"256.400419947507px\" height=\"259.387086614173px\" alt=\"image\"\/><span class=\"import-CommentReference\"\/><\/p><p class=\"import-Imagetitle\">Figure 14 Natural gas meter set<\/p><p class=\"import-Normal\">For propane systems, service regulators are installed by the gas technician\/fitter between the storage container and the building. Propane service regulators are also called second stage regulators or twin stage regulators (Figure 15).<\/p><p class=\"import-Normal\"><img src=\"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-content\/uploads\/sites\/998\/2023\/11\/image20.png\" width=\"403.716640419948px\" height=\"184.2px\" alt=\"image\"\/><img src=\"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-content\/uploads\/sites\/998\/2023\/11\/image21.png\" width=\"161.151076115486px\" height=\"190.784881889764px\" alt=\"image\"\/><span class=\"import-CommentReference\"\/><\/p><p class=\"import-Imagetitle\">Figure 15 Propane service regulators<\/p><p class=\"import-Normal\">The maximum delivery pressures within various types of buildings are listed in section 5.1 of the CSA B149.1 gas code. For example the maximum allowed pressure in a single-family dwelling is 2 psig.<\/p><h2>Appliance regulators<\/h2><p class=\"import-Normal\">Appliance regulators are located on the valve train of the appliance to reduce the inlet pressure of the appliance to the appropriate manifold pressure required for proper burner performance (Figure 16). The main purpose of the appliance regulator is to maintain a relatively constant gas outlet pressure to the burner(s) to assure constant, even flame at the main burners.<\/p><p class=\"import-Normal\" style=\"text-align:center;\"><img src=\"#fixme\" width=\"23.8079790026247px\" height=\"14.538687664042px\" alt=\"image\"\/><br\/><img src=\"#fixme\" width=\"147.4px\" height=\"63.698687664042px\" alt=\"image\"\/>Appliance regulator<br\/><img src=\"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-content\/uploads\/sites\/998\/2023\/11\/image22.jpeg\" width=\"441.461417322835px\" height=\"214.580787401575px\" alt=\"image\"\/><span class=\"import-CommentReference\"\/><\/p><p class=\"import-Imagetitle\">Figure 16 Appliance regulator in valve train<\/p><p class=\"import-Normal\">Most natural gas appliances require a manifold pressure of 3\u201d to 4\u201d WC, while propane appliances typically require 10\u201d to 11\u201d WC. Residential and commercial appliances will typically have an appliance regulator with a maximum inlet pressure of 0.5 psig (14\u201d WC). <\/p><p class=\"import-Normal\">For appliances with inputs less than 400 MBH the appliance regulator is often included as part of a combination gas valve (Figure 17). These combination valves often employ servo operated regulators that can have the manifold pressures stepped or modulated down to as low as 0.5\u201d WC. Combination gas valves will be looked at in greater detail in B1 LT4.<\/p><p class=\"import-Normal\" style=\"text-align:center;\"><img src=\"#fixme\" width=\"22.2240419947507px\" height=\"43.7759580052493px\" alt=\"image\"\/><br\/><img src=\"#fixme\" width=\"87.5520209973753px\" height=\"83.7146456692913px\" alt=\"image\"\/><br\/><img src=\"#fixme\" width=\"89.0879790026247px\" height=\"48.3840419947507px\" alt=\"image\"\/>Regulator <br\/><img src=\"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-content\/uploads\/sites\/998\/2023\/11\/image23.jpeg\" width=\"380.789186351706px\" height=\"285.591916010499px\" alt=\"image\"\/><span class=\"import-CommentReference\"\/><\/p><p class=\"import-Imagetitle\">Figure 17 Appliance regulator as part of a combination gas valve<\/p><h2>Line pressure regulators<\/h2><p class=\"import-Normal\">The service regulator will often deliver a building line pressure that exceeds the maximum allowable pressure specified for the gas appliance. In these cases, line pressure regulators are installed between the building\u2019s service regulator, or LP-gas 2 psig (13.8 kPa) service regulator, and the gas appliance. For example, a 2 psig service will need to be reduce to a maximum of 0.5 psig (14\u201d WC) as that is the maximum inlet pressure to most appliance regulators (Figure 18).<\/p><p class=\"import-Normal\" style=\"text-align:center;\"><img src=\"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-content\/uploads\/sites\/998\/2023\/11\/image24.png\" width=\"385.114960629921px\" height=\"211.106141732283px\" alt=\"image\"\/><span class=\"import-CommentReference\"\/><\/p><p class=\"import-Imagetitle\">Figure 18 Line Pressure Regulator<\/p><p class=\"import-Normal\">Line pressure regulators are classified in accordance with their intended application and are designated either Class I or Class II.<\/p><ul><li>Class I regulators have a maximum outlet pressure setting of \u00bd psig as they are used primarily with residential and light commercial appliances that have \u00bd psig maximum rated inlet pressures. They can be certified for a rated inlet pressure of 2, 5, or 10 psig.<\/li><li>Class II regulators have a maximum outlet pressure setting of 2 psig as they are used primarily with industrial appliances that have 2 psig maximum rated inlet pressures. They can be certified for a rated inlet pressure of 5 or 10 psig.<\/li><\/ul><p class=\"import-Normal\">Line pressure regulators used for installations with a supply pressure exceeding 2 psig require a tested and approved overpressure protection device (OPD), to prevent the outlet pressure from exceeding the rated pressure of the system components.<\/p><h2>High pressure regulators<\/h2><p class=\"import-Normal\">A high pressure regulator is similar to a line pressure regulator except it is used for applications where the inlet gas pressure is greater than 10 psig (70 kPA) and an outlet pressure is greater than 2 psig (14 kPA). An example could be if the gas service was routed directly into the mechanical room of a hotel at the maximum allowable pressure of 20 psig to serve the boiler loads, and then continued from the mechanical room into the hotel to serve other loads. This would require an additional regulator to reduce the gas pressure to a maximum of 5 psig before it left the mechanical room. The other equipment throughout the hotel would still require one of more line pressure regulators to reduce the pressure to \u00bd psig for the appliances.<\/p><\/div>","rendered":"<div class=\"regulator-categories\">\n<p class=\"import-Normal\">There are four categories of pressure regulators as defined in the CSA B149.1 Natural Gas and Propane Installation Code:<\/p>\n<ul>\n<li>Service regulators<\/li>\n<li>Appliance regulators<\/li>\n<li>Line pressure regulators<\/li>\n<li>High pressure regulators<\/li>\n<\/ul>\n<h2>Service regulators<\/h2>\n<p class=\"import-Normal\">Service regulators are installed on a service line to reduce the gas pressure to the desired building pressure. The Natural gas meter sets are provided with a service regulator (Figure 14), which is installed by the gas utility rather than the gasfitter. <\/p>\n<p class=\"import-Normal\"><span style=\"margin-left:26pt\"><img decoding=\"async\" src=\"#fixme\" width=\"16.896062992126px\" height=\"72.96px\" alt=\"image\" \/><br \/><img decoding=\"async\" src=\"#fixme\" width=\"137.472020997375px\" height=\"56.8px\" alt=\"image\" \/>Service regulator<br \/><img decoding=\"async\" src=\"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-content\/uploads\/sites\/998\/2023\/11\/image19.jpeg\" width=\"256.400419947507px\" height=\"259.387086614173px\" alt=\"image\" \/><span class=\"import-CommentReference\"><\/span><\/span><\/p>\n<p class=\"import-Imagetitle\">Figure 14 Natural gas meter set<\/p>\n<p class=\"import-Normal\">For propane systems, service regulators are installed by the gas technician\/fitter between the storage container and the building. Propane service regulators are also called second stage regulators or twin stage regulators (Figure 15).<\/p>\n<p class=\"import-Normal\"><img decoding=\"async\" src=\"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-content\/uploads\/sites\/998\/2023\/11\/image20.png\" width=\"403.716640419948px\" height=\"184.2px\" alt=\"image\" \/><img decoding=\"async\" src=\"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-content\/uploads\/sites\/998\/2023\/11\/image21.png\" width=\"161.151076115486px\" height=\"190.784881889764px\" alt=\"image\" \/><span class=\"import-CommentReference\"><\/span><\/p>\n<p class=\"import-Imagetitle\">Figure 15 Propane service regulators<\/p>\n<p class=\"import-Normal\">The maximum delivery pressures within various types of buildings are listed in section 5.1 of the CSA B149.1 gas code. For example the maximum allowed pressure in a single-family dwelling is 2 psig.<\/p>\n<h2>Appliance regulators<\/h2>\n<p class=\"import-Normal\">Appliance regulators are located on the valve train of the appliance to reduce the inlet pressure of the appliance to the appropriate manifold pressure required for proper burner performance (Figure 16). The main purpose of the appliance regulator is to maintain a relatively constant gas outlet pressure to the burner(s) to assure constant, even flame at the main burners.<\/p>\n<p class=\"import-Normal\" style=\"text-align:center;\"><img decoding=\"async\" src=\"#fixme\" width=\"23.8079790026247px\" height=\"14.538687664042px\" alt=\"image\" \/><br \/><img decoding=\"async\" src=\"#fixme\" width=\"147.4px\" height=\"63.698687664042px\" alt=\"image\" \/>Appliance regulator<br \/><img decoding=\"async\" src=\"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-content\/uploads\/sites\/998\/2023\/11\/image22.jpeg\" width=\"441.461417322835px\" height=\"214.580787401575px\" alt=\"image\" \/><span class=\"import-CommentReference\"><\/span><\/p>\n<p class=\"import-Imagetitle\">Figure 16 Appliance regulator in valve train<\/p>\n<p class=\"import-Normal\">Most natural gas appliances require a manifold pressure of 3\u201d to 4\u201d WC, while propane appliances typically require 10\u201d to 11\u201d WC. Residential and commercial appliances will typically have an appliance regulator with a maximum inlet pressure of 0.5 psig (14\u201d WC). <\/p>\n<p class=\"import-Normal\">For appliances with inputs less than 400 MBH the appliance regulator is often included as part of a combination gas valve (Figure 17). These combination valves often employ servo operated regulators that can have the manifold pressures stepped or modulated down to as low as 0.5\u201d WC. Combination gas valves will be looked at in greater detail in B1 LT4.<\/p>\n<p class=\"import-Normal\" style=\"text-align:center;\"><img decoding=\"async\" src=\"#fixme\" width=\"22.2240419947507px\" height=\"43.7759580052493px\" alt=\"image\" \/><br \/><img decoding=\"async\" src=\"#fixme\" width=\"87.5520209973753px\" height=\"83.7146456692913px\" alt=\"image\" \/><br \/><img decoding=\"async\" src=\"#fixme\" width=\"89.0879790026247px\" height=\"48.3840419947507px\" alt=\"image\" \/>Regulator <br \/><img decoding=\"async\" src=\"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-content\/uploads\/sites\/998\/2023\/11\/image23.jpeg\" width=\"380.789186351706px\" height=\"285.591916010499px\" alt=\"image\" \/><span class=\"import-CommentReference\"><\/span><\/p>\n<p class=\"import-Imagetitle\">Figure 17 Appliance regulator as part of a combination gas valve<\/p>\n<h2>Line pressure regulators<\/h2>\n<p class=\"import-Normal\">The service regulator will often deliver a building line pressure that exceeds the maximum allowable pressure specified for the gas appliance. In these cases, line pressure regulators are installed between the building\u2019s service regulator, or LP-gas 2 psig (13.8 kPa) service regulator, and the gas appliance. For example, a 2 psig service will need to be reduce to a maximum of 0.5 psig (14\u201d WC) as that is the maximum inlet pressure to most appliance regulators (Figure 18).<\/p>\n<p class=\"import-Normal\" style=\"text-align:center;\"><img decoding=\"async\" src=\"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-content\/uploads\/sites\/998\/2023\/11\/image24.png\" width=\"385.114960629921px\" height=\"211.106141732283px\" alt=\"image\" \/><span class=\"import-CommentReference\"><\/span><\/p>\n<p class=\"import-Imagetitle\">Figure 18 Line Pressure Regulator<\/p>\n<p class=\"import-Normal\">Line pressure regulators are classified in accordance with their intended application and are designated either Class I or Class II.<\/p>\n<ul>\n<li>Class I regulators have a maximum outlet pressure setting of \u00bd psig as they are used primarily with residential and light commercial appliances that have \u00bd psig maximum rated inlet pressures. They can be certified for a rated inlet pressure of 2, 5, or 10 psig.<\/li>\n<li>Class II regulators have a maximum outlet pressure setting of 2 psig as they are used primarily with industrial appliances that have 2 psig maximum rated inlet pressures. They can be certified for a rated inlet pressure of 5 or 10 psig.<\/li>\n<\/ul>\n<p class=\"import-Normal\">Line pressure regulators used for installations with a supply pressure exceeding 2 psig require a tested and approved overpressure protection device (OPD), to prevent the outlet pressure from exceeding the rated pressure of the system components.<\/p>\n<h2>High pressure regulators<\/h2>\n<p class=\"import-Normal\">A high pressure regulator is similar to a line pressure regulator except it is used for applications where the inlet gas pressure is greater than 10 psig (70 kPA) and an outlet pressure is greater than 2 psig (14 kPA). An example could be if the gas service was routed directly into the mechanical room of a hotel at the maximum allowable pressure of 20 psig to serve the boiler loads, and then continued from the mechanical room into the hotel to serve other loads. This would require an additional regulator to reduce the gas pressure to a maximum of 5 psig before it left the mechanical room. The other equipment throughout the hotel would still require one of more line pressure regulators to reduce the pressure to \u00bd psig for the appliances.<\/p>\n<\/div>\n","protected":false},"author":940,"menu_order":9,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-326","chapter","type-chapter","status-web-only","hentry"],"part":3,"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-json\/pressbooks\/v2\/chapters\/326","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-json\/wp\/v2\/users\/940"}],"version-history":[{"count":1,"href":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-json\/pressbooks\/v2\/chapters\/326\/revisions"}],"predecessor-version":[{"id":362,"href":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-json\/pressbooks\/v2\/chapters\/326\/revisions\/362"}],"part":[{"href":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-json\/pressbooks\/v2\/parts\/3"}],"metadata":[{"href":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-json\/pressbooks\/v2\/chapters\/326\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-json\/wp\/v2\/media?parent=326"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-json\/pressbooks\/v2\/chapter-type?post=326"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-json\/wp\/v2\/contributor?post=326"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/hfriedman\/wp-json\/wp\/v2\/license?post=326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}