{"title":"Siemens VRD Gas Valves","description":"\u003ch1\u003eSiemens VRD Gas Valves\u003c\/h1\u003e\n\u003cp\u003eSiemens VRD gas valves are double-seat safety shut-off valves designed for use in industrial combustion systems operating with biogas and other special gases. They are specified where the characteristics of alternative fuels require valve bodies specifically engineered to maintain reliable shut-off and long-term operational safety.\u003c\/p\u003e\n\u003cp\u003eVRD valves form part of Siemens’ combustion safety portfolio and are typically used in applications where standard natural gas valve bodies are not suitable. They are designed to operate in combination with Siemens SKP actuators as part of a complete gas train.\u003c\/p\u003e\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBiogas installations\u003c\/li\u003e\n\u003cli\u003eWaste-to-energy and renewable energy systems\u003c\/li\u003e\n\u003cli\u003eIndustrial combustion processes using special gases\u003c\/li\u003e\n\u003cli\u003eInstallations requiring double-seat safety shut-off\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eValve Design and Safety Function\u003c\/h3\u003e\n\u003cp\u003eSiemens VRD valves incorporate a double-seat shut-off design, providing redundant isolation of the gas supply. This configuration supports safe operation in combustion systems where enhanced safety integrity is required.\u003c\/p\u003e\n\u003cp\u003eThe valve bodies are constructed to accommodate the specific properties of biogas and special gases, helping to maintain consistent performance and reliable sealing under demanding operating conditions.\u003c\/p\u003e\n\u003cp\u003eVRD valves are designed for use with Siemens SKP actuators. The selected actuator determines the functional behaviour of the valve within the gas train, including shut-off operation and associated control functions.\u003c\/p\u003e\n\u003ch3\u003eCompatible Siemens SKP Actuators\u003c\/h3\u003e\n\u003cp\u003eSiemens VRD gas valves are used in combination with Siemens SKP actuators, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKP15\u003c\/strong\u003e – Safety shut-off (ON\/OFF)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKP25\u003c\/strong\u003e – Safety shut-off with pressure regulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKP55\u003c\/strong\u003e – Safety shut-off with differential pressure air–gas ratio control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKP75\u003c\/strong\u003e – Safety shut-off with adjustable air–gas ratio control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCorrect actuator selection is essential to ensure compatibility with the valve body and to maintain safe and compliant system operation.\u003c\/p\u003e\n\u003ch3\u003eAvailable VRD Valve Sizes and Specifications\u003c\/h3\u003e\n\u003cp\u003eThe Siemens VRD range is available in a variety of nominal sizes and connection configurations to suit different combustion system requirements. Detailed specifications for each VRD valve model, including pressure ratings and materials, are provided within the individual product listings below.\u003c\/p\u003e\n\u003ch3\u003eReplacement and Selection Guidance\u003c\/h3\u003e\n\u003cp\u003eWhen replacing an existing Siemens VRD gas valve, the full model number shown on the valve rating plate should always be matched. Valve size, pressure rating, and actuator compatibility must be confirmed to ensure safe operation.\u003c\/p\u003e\n\u003cp\u003eIf you are unsure whether a VRD valve is required for your application, or if an alternative Siemens valve family may be suitable, technical confirmation is recommended before ordering.\u003c\/p\u003e\n\u003ch3\u003eRelated Siemens Components\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/comtherm.co.uk\/collections\/siemens-skp\" title=\"Siemens SKP Actuators\"\u003eSiemens SKP gas valve actuators\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/comtherm.co.uk\/collections\/pressure-switches?sort_by=price-ascending\u0026amp;filter.p.vendor=Siemens\" title=\"Siemens Pressure Switches\"\u003eSiemens pressure switches\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/comtherm.co.uk\/collections\/flame-detection?filter.p.product_type=Flame+Detector\u0026amp;filter.p.vendor=Siemens\" title=\"Siemens Flame Detectors\"\u003eSiemens burner and flame control equipment\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"siemens-vrd40-040-biogas-valve","title":"Siemens VRD40.040 Biogas valve","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n \u003cp\u003eThe normally closed VRD40.040 modular double-body gas valves combine with \u003ca href=\"https:\/\/comtherm.co.uk\/collections\/siemens-skp\" title=\"Siemens SKP Actuators\"\u003eSKP\u003c\/a\u003e¬¦ series electro-hydraulic actuators to provide safety shut-off, gas pressure regulation and\/or air-gas ratio control for commercial or industrial gas burners.\u003c\/p\u003e\n \u003cp\u003eDesigned for use with slightly aggressive and dry gases\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eMaximum 140 °F (60 °C)\u003c\/li\u003e\n \u003cli\u003eGases like biogases, digester gases, process gases, natural gas or air\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003eThe chemical composition and aggressiveness of each type of biogas or recycling gas is different, not constant and depends on several factors.\u003c\/p\u003e\n \u003cp\u003eWith VRD40.xxxUx valves in biogas applications:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eInstall a valve proving device \/ sequence\u003c\/li\u003e\n \u003cli\u003eLeak test the valves at 6- to 12-month intervals\u003c\/li\u003e\n \u003cli\u003eInstall SKPx5... with POC\u003c\/li\u003e\n \u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":44579715318014,"sku":"SPA2017","price":1563.98,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/4028\/9022\/files\/Siemens_VRD40.png?v=1753851882"},{"product_id":"siemens-vrd40-050-biogas-valve","title":"Siemens VRD40.050 Biogas valve","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n \u003cp\u003eThe normally closed VRD40.050 modular double-body gas valves combine with \u003ca title=\"Siemens SKP Actuators\" href=\"https:\/\/comtherm.co.uk\/collections\/siemens-skp\"\u003eSKP\u003c\/a\u003e¬¦ series electro-hydraulic actuators to provide safety shut-off, gas pressure regulation and\/or air-gas ratio control for commercial or industrial gas burners.\u003c\/p\u003e\n \u003cp\u003eDesigned for use with slightly aggressive and dry gases\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eMaximum 140 °F (60 °C)\u003c\/li\u003e\n \u003cli\u003eGases like biogases, digester gases, process gases, natural gas or air\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003eThe chemical composition and aggressiveness of each type of biogas or recycling gas is different, not constant and depends on several factors.\u003c\/p\u003e\n \u003cp\u003eWith VRD40.xxxUx valves in biogas applications:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eInstall a valve proving device \/ sequence\u003c\/li\u003e\n \u003cli\u003eLeak test the valves at 6- to 12-month intervals\u003c\/li\u003e\n \u003cli\u003eInstall SKPx5... with POC\u003c\/li\u003e\n \u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":44579715907838,"sku":"SPA2018","price":1599.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/4028\/9022\/files\/Siemens_VRD40_f70747d9-da67-44e2-ab21-02ebb0c370f8.png?v=1753851881"},{"product_id":"siemens-vrd40-065-biogas-valve","title":"Siemens VRD40.065 Biogas valve","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n \u003cp\u003eThe normally closed VRD40.065 modular double-body gas valves combine with \u003ca title=\"Siemens SKP Actuators\" href=\"https:\/\/comtherm.co.uk\/collections\/siemens-skp\"\u003eSKP\u003c\/a\u003e¬¦ series electro-hydraulic actuators to provide safety shut-off, gas pressure regulation and\/or air-gas ratio control for commercial or industrial gas burners.\u003c\/p\u003e\n \u003cp\u003eDesigned for use with slightly aggressive and dry gases\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eMaximum 140 °F (60 °C)\u003c\/li\u003e\n \u003cli\u003eGases like biogases, digester gases, process gases, natural gas or air\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003eThe chemical composition and aggressiveness of each type of biogas or recycling gas is different, not constant and depends on several factors.\u003c\/p\u003e\n \u003cp\u003eWith VRD40.xxxUx valves in biogas applications:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eInstall a valve proving device \/ sequence\u003c\/li\u003e\n \u003cli\u003eLeak test the valves at 6- to 12-month intervals\u003c\/li\u003e\n \u003cli\u003eInstall SKPx5... with POC\u003c\/li\u003e\n \u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":44579715973374,"sku":"SPA2019","price":1626.32,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/4028\/9022\/files\/Siemens_VRD40_ada53b16-9969-4c97-9f61-34d534e06d4d.png?v=1753851880"},{"product_id":"siemens-vrd40-080-biogas-valve","title":"Siemens VRD40.080 Biogas valve","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n \u003cp\u003eThe normally closed VRD40.080 modular double-body gas valves combine with \u003ca title=\"Siemens SKP Actuators\" href=\"https:\/\/comtherm.co.uk\/collections\/siemens-skp\"\u003eSKP\u003c\/a\u003e¬¦ series electro-hydraulic actuators to provide safety shut-off, gas pressure regulation and\/or air-gas ratio control for commercial or industrial gas burners.\u003c\/p\u003e\n \u003cp\u003eDesigned for use with slightly aggressive and dry gases\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eMaximum 140 °F (60 °C)\u003c\/li\u003e\n \u003cli\u003eGases like biogases, digester gases, process gases, natural gas or air\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003eThe chemical composition and aggressiveness of each type of biogas or recycling gas is different, not constant and depends on several factors.\u003c\/p\u003e\n \u003cp\u003eWith VRD40.xxxUx valves in biogas applications:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eInstall a valve proving device \/ sequence\u003c\/li\u003e\n \u003cli\u003eLeak test the valves at 6- to 12-month intervals\u003c\/li\u003e\n \u003cli\u003eInstall SKPx5... with POC\u003c\/li\u003e\n \u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":44579716071678,"sku":"SPA2020","price":2456.59,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/4028\/9022\/files\/Siemens_VRD40_903ebf57-8769-435d-909d-5325a96a9b46.png?v=1753851879"},{"product_id":"siemens-vrd40-100-biogas-valve","title":"Siemens VRD40.100 Biogas valve","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n \u003cp\u003eThe normally closed VRD40.100 modular double-body gas valves combine with \u003ca title=\"Siemens SKP Actuators\" href=\"https:\/\/comtherm.co.uk\/collections\/siemens-skp\"\u003eSKP\u003c\/a\u003e¬¦ series electro-hydraulic actuators to provide safety shut-off, gas pressure regulation and\/or air-gas ratio control for commercial or industrial gas burners.\u003c\/p\u003e\n \u003cp\u003eDesigned for use with slightly aggressive and dry gases\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eMaximum 140 °F (60 °C)\u003c\/li\u003e\n \u003cli\u003eGases like biogases, digester gases, process gases, natural gas or air\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003eThe chemical composition and aggressiveness of each type of biogas or recycling gas is different, not constant and depends on several factors.\u003c\/p\u003e\n \u003cp\u003eWith VRD40.xxxUx valves in biogas applications:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eInstall a valve proving device \/ sequence\u003c\/li\u003e\n \u003cli\u003eLeak test the valves at 6- to 12-month intervals\u003c\/li\u003e\n \u003cli\u003eInstall SKPx5... with POC\u003c\/li\u003e\n \u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":44579716661502,"sku":"SPA2021","price":4577.13,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/4028\/9022\/files\/Siemens_VRD40_08fcc24b-a069-42d1-9028-a1c72c04307f.png?v=1753851878"},{"product_id":"siemens-vrd40-125-biogas-valve","title":"Siemens VRD40.125 Biogas valve","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n \u003cp\u003eThe normally closed VRD40.0125 modular double-body gas valves combine with \u003ca title=\"Siemens SKP Actuators\" href=\"https:\/\/comtherm.co.uk\/collections\/siemens-skp\"\u003eSKP\u003c\/a\u003e¬¦ series electro-hydraulic actuators to provide safety shut-off, gas pressure regulation and\/or air-gas ratio control for commercial or industrial gas burners.\u003c\/p\u003e\n \u003cp\u003eDesigned for use with slightly aggressive and dry gases\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eMaximum 140 °F (60 °C)\u003c\/li\u003e\n \u003cli\u003eGases like biogases, digester gases, process gases, natural gas or air\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003eThe chemical composition and aggressiveness of each type of biogas or recycling gas is different, not constant and depends on several factors.\u003c\/p\u003e\n \u003cp\u003eWith VRD40.xxxUx valves in biogas applications:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eInstall a valve proving device \/ sequence\u003c\/li\u003e\n \u003cli\u003eLeak test the valves at 6- to 12-month intervals\u003c\/li\u003e\n \u003cli\u003eInstall SKPx5... with POC\u003c\/li\u003e\n \u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":44579716727038,"sku":"SPA2022","price":6600.34,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/4028\/9022\/files\/Siemens_VRD40_d5125ea9-b632-431c-84fa-860010641a0d.png?v=1753851877"},{"product_id":"siemens-vrd40-150-biogas-valve","title":"Siemens VRD40.150 Biogas valve","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n \u003cp\u003eThe normally closed VRD40.150 modular double-body gas valves combine with \u003ca title=\"Siemens SKP Actuators\" href=\"https:\/\/comtherm.co.uk\/collections\/siemens-skp\"\u003eSKP\u003c\/a\u003e¬¦ series electro-hydraulic actuators to provide safety shut-off, gas pressure regulation and\/or air-gas ratio control for commercial or industrial gas burners.\u003c\/p\u003e\n \u003cp\u003eDesigned for use with slightly aggressive and dry gases\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eMaximum 140 °F (60 °C)\u003c\/li\u003e\n \u003cli\u003eGases like biogases, digester gases, process gases, natural gas or air\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003eThe chemical composition and aggressiveness of each type of biogas or recycling gas is different, not constant and depends on several factors.\u003c\/p\u003e\n \u003cp\u003eWith VRD40.xxxUx valves in biogas applications:\u003c\/p\u003e\n \u003cul\u003e\n \u003cli\u003eInstall a valve proving device \/ sequence\u003c\/li\u003e\n \u003cli\u003eLeak test the valves at 6- to 12-month intervals\u003c\/li\u003e\n \u003cli\u003eInstall SKPx5... with POC\u003c\/li\u003e\n \u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":44579716759806,"sku":"SPA2023","price":8882.37,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/4028\/9022\/files\/Siemens_VRD40_18bbd005-8d1c-4359-8469-78aa8ea6670c.png?v=1753851876"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/4028\/9022\/collections\/Siemens_VRD40.png?v=1768496694","url":"https:\/\/comtherm-shop.myshopify.com\/collections\/siemens-vrd-gas-valves.oembed","provider":"Comtherm Ltd","version":"1.0","type":"link"}