The relief valve function features a rugged tungsten carbide ball and a 440C seat for durability and long life.
The remaining components are constructed entirely of stainless steel. Offered with or without integral safety screens, the 281 PRI/Chek valve is available in a range of relief flow cracking pressures for system pressures up to 5,000 psi.
Maximum restriction in the Free Flow Direction is only 300 Lohms (550 Lohms for screened version). Each Lee PRI/Chek valve is 100 percent tested and inspected in both flow directions to ensure reliable, consistent performance.