SV60 Series Steam Safety Relief Valve- Spirax Sarco Suitable for the protection of steam boilers, pipelines, pressure vessels, compressors and receivers and most general process industry applications: Available Models: SV604, SV607 SV604: Carbon steel, Closed bonnet, Open type easing lever, Sealed cap.SV607: Open bonnet, Packed easing lever – DN20 to DN100 only, Open type easing lever. Download SV60 Series Catalogue SV60 SPECIFICATION TABLE