valve,Masoneilan valve, control valve top guided--rugged, heavy top plug guiding provides maxium support to ensure plug stability single and double stage--Lo-dB/ Anti-cavitation trim reduced capacity high pressure capability tight shutoff--classVI leakage is standard, optional constructions meet IEC 534-4 and ANSI/FC/FCI 70.2 class V and VI hardened trim environmental packing emission free--bellows seal design option is available to meet zero emissions requirements NACE Compliance