{"product_id":"aptech-ap3540sm-stainless-steel-diaphragm-valve","title":"APTECH AP3540SM Stainless Steel Diaphragm Valve","description":"\u003cdiv\u003e\u003cp\u003eAPTech AP3540SM stainless steel, springless diaphragm valve delivers precise gas control in ultra-high-purity process systems. The body is constructed from 316L stainless steel (with Ni-Cr-Mo alloy options in some configurations) and uses a PCTFE seat to promote tight shutoff in clean gas lines. It has a Cv of 0.29 and offers 1\/4\" or 3\/8\" porting with either 1\/4\" face-seal or tube-stub connections, enabling compact, retrofit-friendly installations. Operating pressure is rated to 145 psi (10 bar), making it suitable for low-to-moderate gas pressures in high-purity applications. A replaceable seat and options for process-safety accessories such as lockout\/tagout (LOTO) and monitoring switches support long service life and compliance in critical environments; surface finishes up to 15 Ra max are available to meet cleanliness requirements. Typical uses include semiconductor process gas delivery, high-purity gas lines in pharma\/biotech facilities, and other controlled-gas systems where reliable, bubble-free shutoff is essential.\u003c\/p\u003e\u003c\/div\u003e","brand":"APTECH","offers":[{"title":"New","offer_id":51660078842158,"sku":null,"price":1370.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_8a02279c-3c05-4575-90ac-c82123821ad3.jpg?v=1769532619","url":"https:\/\/plgautomation.com\/products\/aptech-ap3540sm-stainless-steel-diaphragm-valve","provider":"PLG Automation ","version":"1.0","type":"link"}