Fisher C891 Series Internal Valves

Product Description

The Fisher C891 Series Internal Valves are robust and versatile components typically installed on the inlets and outlets of transport trucks and large stationary storage tanks. These valves are serialized to meet the specific service requirements outlined in the order. While primarily designed for liquefied gases, they can be used for other compressed gases with material compatibility verification from the manufacturer.

Key Features

• Rapid Equalization Bleed Area: Ensures efficient pressure equalization.

• Unique Serviceability Features: Simplifies maintenance and enhances valve longevity.

• Excess Flow Closure: Provides automatic closure in case of excess flow, enhancing safety.

• Back Check Feature: Prevents backflow to maintain system integrity.

• Enhanced Durability:

  • Spring-loaded PTFE stub shaft packing for a secure seal.

  • PTFE wear pads and Rulon® bushings at critical wear points.

• Flexible Actuation Options: Manual, cable, or air-operated actuators for operational versatility.

• Thermal Safety Mechanism: Fusible links or plugs melt at 212–220°F (100–104°C), triggering valve closure in case of fire.
  

Specifications

• Body Sizes and End Connection Styles (Inlet x Outlet):

  • Inlet: 2-inch or 3-inch CL300 RF flanged

  • Outlet: 2-inch or 3-inch CL300 RF flanged

• Maximum Allowable Inlet Pressure: 500 psig (34.5 bar) WOG

• Temperature Range: -20°F to 160°F (-29°C to 71°C)

• Approximate Weights:

  • 2-Inch (DN 50): 20 pounds (9 kg)

  • 3-Inch (DN 80): 32 pounds (15 kg)