Divert valves (PRV, In-line) with BSP screwed connections
HD Process supply various types of in-line stainless steel valves. Photos attached here of the Tassalini version screwed BSP connections (1/4” through to 1”) divert valves.
These units have manually adjustable set points (up to eg 6 bar for the 1” version and 10 bar for the ½” version).