Swaco Choke valves are designed to control flow or pressure of fluids by change of choking area, available with various types such as positive choke valve, adjustable choke valve, orifice type choke valve and plunger type choke valve. We can offer customized choke valve based on customer needs. Feature: 1. Products design, manufacture and inspection fully comply with API Spec 6A and NACE MR0175. 2. Body is available with a port for monitor and pressure release. 3. The added safety pin is designed to release cavity pressure prior to removing bonnet. 4. Made of hard alloy, valve plug and seat have excellent wear and erosion resistance to ensure normal operation of choke valves. 5. Orifice and seat are installed below the entry pass to extend the service life. 6. Simple configuration and easy to maintain. Swaco Style drilling choke in China