Noshok's new 2070 Series 2-Valve block and bleed needle (BBN) valves combine isolating and venting, and with a 10,000psi pressure rating (at 200F maximum), the valve eliminates the need for tubing and fittings.
The block valve isolates the downstream process fluids, and the bleed valve exhausts upstream fluids, enabling instruments to be removed without disturbing the permanent piping installation.
Other features include: a 1/4in NPT vent plug located 90° to the left, that may be removed and replaced with exhaust piping to direct the fluids to a safe location; a 1/2in NPT connection, M-F, F-F configurations available, with right venting optional; a blow-out proof stem that provides a secondary stem seal in the full open position; Viton O-Ring and Teflon back-up ring stem seals; all 316 stainless steel stems (even in steel valves) for extended service life; stem and bonnet threads are rolled for strength and ease of operation; one-piece bonnet with a metal-to-metal seal to the valve body below the bonnet threads; bonnet lock pin to prevent accidental loosening; vinyl bonnet and stem dust cap; 0.187in orifice size; 4in standard and 5-3/8in extended length available; and optional panel mount bonnet and panel nuts.