700 Series: Check Valves Available in a variety of sizes and in Brass or Stainless Steel 316. 700 Series: Check Valves Benefits N Pressure rating up to 3000 psig (206 bar) at 70ºF (21ºC) N Temperature rating up to 375ºF (191ºC) with standard Viton O-Ring N Body materials available in 316 Stainless Steel and Brass N 100% factory tested for cracking and reseal