3-Piece Ball Valve DM7000/DM8000 Series

faq: items: - question: What practical advantages does the integral direct-mount flange of DM7000/DM8000 Series 3-piece ball valves offer for automation control? answer: This series features an integrally cast direct-mount flange that reduces connection components between the valve, mounting bracket, and actuator, minimizes overall installation size, and reduces hysteresis between the ball and actuator in control applications. This design also allows for easier and safer removal of actuation equipment while the line remains at full pressure. - question: How does the DM7000/DM8000 maintain stem seal performance under temperature changes, packing wear, or vacuum conditions? answer: The valve uses self-adjusting live-loaded packing that applies continuous preload to the stem packing via Belleville washers, compensating for environmental changes and packing wear. This design is suitable for both positive pressure and low-pressure/vacuum sealing conditions, helping maintain long-term stable stem sealing performance. - question: What factors should be considered when selecting DM7000/DM8000 seats for different media and operating conditions? answer: Selection should focus on media characteristics, operating temperature, pressure, sealing requirements, and valve function. This series offers UHMWPE, RPTFE/TFM, 50/50 stainless steel-filled TFE, and Tek-Fil® seat material options; specific configuration depends on the actual model and application conditions. - question: What end connections are available for the DM7000/DM8000 Series, and what piping installation needs do they suit? answer: The series offers NPT threaded, socket weld, extended socket weld, butt weld, extended butt weld, and ASME Class 150 flanged connections. For systems requiring welded connections, insulation space, flange assembly/disassembly, or threaded piping, the appropriate end type can be selected based on piping standards, installation space, and maintenance requirements. - question: Can the DM7000/DM8000 be used for flow regulation or reducing cavity media retention? answer: Yes. The series offers optional V-ball control valve trim for flow regulation applications; it can also be configured with cavity filler, polished internals, vented ball, and special cleaning configurations to meet different process control and cleanliness requirements. Specific configuration depends on the actual model and application conditions.

Product Overview

Lined seal technology for industrial flow control applications

The DM7000/8000 Series 3-piece ball valve features an integral cast direct-mount flange designed to reduce parts count, overall envelope size, and hysteresis between the ball and actuator in control valve applications. The integral mount also includes an extended section with a 1/8” NPT threaded side port for fugitive emission monitoring, leak detection, fugitive emission transfer, use as a positive pressure seal, and emergency repair by injecting sealant through a check valve. The DM7000/DM8000 Series three-piece ball valve is ideal for process applications. Self-adjusting live-loaded packing uses Belleville washers to positively preload the stem packing, compensating for environmental changes and wear, ensuring leak-free, bubble-tight sealing, maintenance-free operation, and long cycle life for positive and low-pressure/vacuum sealing. Resilient seat materials include RPTFE, TFM, UHMWPE, Tek Fil (carbon graphite/TFM), and 50/50 stainless steel filled PTFE. The DM7000/DM8000 can be supplied with optional trim and configurations, including V-ball control valve trim, cavity filler, polished internals, vented ball, and other special cleaning. The flexible design of the DM7000/DM8000 Series three-piece ball valve also allows for in-line repair and easy, safe removal of actuation equipment while the valve is under full line pressure. With industry-leading warranty and reliability reputation, Bray DM7000/DM8000 Series three-piece ball valves deliver superior performance, reliable operation, and value across a wide range of industrial flow control applications.

Specifications