Fisher easy-e Cryogenic Universal Globe Valves – Sliding Stem Valves

Product Overview

Fisher easy-e Cryogenic Universal Globe Valvesare part of the sliding stem valve rangethat have either balanced or unbalanced valve plugs and feature stainless steel materials, specialised seals, and extension bonnets for cryogenic service applications with temperatures down to -193°C (-325°F).

The easy-e Cryogenic valves are available in sizes ranging from NPS 1 to 30 and pressure ratings up to CL600, with several globe body, sliding-stem configurations, including ET-C, EWT-C, and EZ-C:

• ET-C: Balanced, cage-guided, push-down-to-close valve
• EWT-C: Balanced, cage-guided, push-down-to-close valve with expanded end connections
• EZ-C: Unbalanced, post-guided, push-down-to-close valve

The high-capacity ET-C and EWT-C valves with pressure-balanced trim allow the use of smaller, lower-cost actuators, reducing installed costs in high-pressure and high-flow-rate applications.

Product Features

• Compliance with the Clean Air Act—ENVIRO-SEAL™ packing systems provide an improved stem seal to help prevent the loss of process fluid. The ENVIRO-SEAL packing systems feature PTFE, Graphite ULF, or Duplex packing with live loading for reduced packing maintenance
• Cryogenic Design Features—The stainless steel materials, specialized seals, and extension bonnet are designed to meet cryogenic temperature requirements
• Rugged Metal Seat—The metal-to-metal seat is designed and manufactured to provide long-lasting, reliable, tight shutoff at both ambient and cryogenic temperatures, without the need for periodic lapping. This reduces the need for soft seats, even in applications with stringent shutoff requirements
• Piping Economy–Expanded end connections of EWT-C valve bodies may reduce the need for line swages, while accommodating oversized piping arrangements used to limit fluid flow velocities
• Valve Plug Stability— Rugged cage guiding for the ET-C and EWT-C provides high valve plug stability, which reduces vibration and mechanical noise. Post guiding for the EZ-C also provides valve plug stability, but with less chance of a sticking valve plug due to non-lubricating or sticky process fluids or build-up of entrained solids
• Balanced Valve Plug Construction— ET-C and EWT-C balanced valve plugs permit the use of smaller, lower-cost Fisher actuators
• More Flow Capacity for Initial Investment— Streamlined flow passages provide excellent capacities and flow
• Sour Service Capability—Materials are available to meet NACE standards
• Application Flexibility—In EZ-C constructions, low-flow requirements can be satisfied with standard restricted-capacity trim or with Micro-Form, Micro-Flute, or Micro-Flow valve plugs. If flow requirements change, the valve can be converted to full-sized trim
• Operating Economy—Increased wear resistance provided by standard, hardened stainless steel trim means long service life
• Maintenance Economy— Trim inventory costs are cut because dimensional standardization permits use of most standard easy-e trim parts. During removal of trim parts, the valve body can stay in the pipeline
• Thoroughly Tested—Extensive cryogenic testing during the development of the valve design reduces the need for expensive cold testing for most applications, which results in quicker delivery and greater value

PRODUCT Specification

1. Valve size number is end connection size by normal trim size. For example, an NPS 6X4 EWT-C valve has NPS 6 end connections with NPS 4 trim (see table 4 on data sheet). 2. Do not exceed the pressure or temperature limits in this bulletin, and any applicable code limitations. 3. UHMWPE stands for ultra high molecular weight polyethylene. 4. A spring is used only with PTFE V-ring packing. A lantern rings replace the spring in other packing arrangements. 5. Down is in through the cage and out the seat ring (see figure 1 on data sheet). 6. Class V shutoff cannot be performed with water. The residual trapped moisture from testing with water can cause valve and trim damage from the ice crystals formed at below freezing service temperatures.

Materials of construction

1. UHMWPE stands for ultra high molecular weight polyethylene
2. A spring is used only with PTFE V-ring packing. A lantern rings replace the spring in other packing arrangements

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