Besa 249 Safety Valve

The Resideo DH300 Pressure Sustaining Valve is designed to precisely regulate pressure on the inlet side. These valves are essential in applications where a specific inlet pressure must be maintained, such as in limiting pressure within the inlet supply network or in transitional links between supply networks and high-demand users. Their compact design makes them particularly suitable for installations in confined spaces, such as ducts. The DH300 is perfect for both commercial and industrial applications, aligning with its specified parameters.

APPROVALS • DVGW • WRAS (up to 23 °C)

SPECIAL FEATURES • Exceptional precision control even during pressure fluctuations and low flow rates • High flow capacity • Accurate control performance • Powder-coated both internally and externally, using safe and non-toxic materials • Integrated control circuit and ball valves • Built-in fine filter • Operates without requiring external energy • Complies with BSEN 1567

Product Codes:

DH300-50A, DH300-65A, DH300-80A, DH300-100A, DH300-150A, DH300-200A, DH300-250A

The Emerson Kunkle Model 337 safety relief valve is specifically designed to safeguard low to medium pressure, high-volume blowers, compressors, conveying systems, and bulk hauling trailers and equipment. Our service includes complimentary setting and testing of the valve, along with a pressure test certificate that verifies this process.

Key Features:

- The large nozzle design ensures high capacity performance.
- Flat bronze valve seats are lapped to deliver optimal functionality.
- The adjustable warn ring allows for precise opening with minimal pre-opening or simmer.
- The pivot between the disc and spring corrects misalignment and compensates for any spring side thrust.
- The Model 337 includes a 'lift-pin' device for hassle-free manual testing.
- Standard construction features a bronze nozzle and disc, with the option for stainless steel trim available.
- Each valve undergoes meticulous testing and inspection for pressure settings and leakage.

Specifications:
Material: Body - Cast Iron / Nozzle - Bronze
Sizes: 2" to 3" (DN50 to DN80)
Connections: NPT Male Inlet x NPT Female Outlet or BSPT Male Inlet x BSPT Female Outlet
Orifice: 2" - 1.916 Sq.in / 2.1/2" - 2.786 Sq.in / 3" - 4.037 Sq.in
Medium: Air
Pressure Range: 0.07 to 4.1 barg (1 to 60 psig)
Temperature Range: -29°C to 208°C (-20°F to 406°F)

The Fig. 970W and 970WG valves feature a robust ductile iron body with integrated notch plate, anti-blowout stem, and fully bonded epoxy coating for Level 3 C3 corrosion protection. WRAS approved for potable water (-10 to 80°C), they are maintenance-free, suitable for flow regulation and gas applications, and DN250+ valves include a gear operator. Compliant with BS EN 593/558 and approved for Group 1 & 2 gases and liquids (PED 2014/68/EU). Rated PN16, -10 to 80°C (WRAS) or -10 to 100°C (Non-WRAS).