Fisher H733-250 3" MNPT Flush Mounted SS Internal Relief Valve, 250 PSI

The Fisher H733-250 is a high-performance flush-mounted internal relief valve designed for mobile applications, particularly for trucks transporting LP-Gas, Anhydrous Ammonia (NH3), or other compressed gases. This valve features robust stainless steel construction to resist rust and corrosion, ensuring long-lasting durability and reliability.

Key Features:

• Stainless Steel Construction: Body, stem, disc holder, and springs are made of stainless steel for maximum corrosion resistance.
• Stainless Steel Springs: Provides consistent performance and durability.
• True Internal Design: Ideal for mobile applications.
• Standard Spring Settings: Ensures reliable operation.
• Nitrile (NBR) Seat: Offers excellent sealing performance.
• Serial Numbers for Identification: Facilitates easy tracking and maintenance.
• UL Approved: Meets stringent safety standards.
• Protective Cap Included: Type P298.

Specifications:

• Type: H733-250
• Container Connection: 3 in. MNPT
• Start to Discharge Setting: 250 psig (17.2 bar)
• Flow Capacity:
  • UL: 10,150 SCFM (17,245 SCMH)
  • ASME: 9,369 SCFM (15,918 SCMH)
• For Tank With Area Up To: 598 ft² (55.6 m²)
• Temperature Rating: -20° to 160°F (-29° to 71°C)
• Approval: UL Listed

Note: Use with a 2-1/2 in. hex size installation tool.