Options & Add Ons
SEALS & SEATS
- Fluorelastomers (Viton)
- Perfluorelastomers (Kalrez)
- ED resistant grades
- PTFE lip seals
- Hi-temp composite (Z65HT)
- Metal to Metal
At Chromatic, we use years of experience in selecting the most appropriate materials based on the media, pressure, temperature, duty and customer specifications. There are no standard materials, but commonly used materials are listed below.
Carbon steel (A216 WCC); impact tested low temperature carbon steel (A352 LCC); stainless steel (A351 CF8M)
Duplex and Super Duplex; Chrome-Moly alloy (WC5 and WC9); Inconel and; Monel
Carbon steel (A216 WCC); impact tested low temperature carbon steel (A352 LCC); stainless steel (A351 CF8M); Duplex; 13 Chrome, 17-4; NACE MR0175.
Trim materials are offered based the application
CRA coatings for all wetted parts; HVOF (Tungsten and Chrome Carbide); Nitriding
LIVE-LOADED STEM PACKING
The standard stem packing is a 5-ring packing set with either graphite or PTFE and can be modified to include a live load system. The packing system can also include dual sets with leak detection and emergency sealant injection.
HIGH TEMPERATURE TRIM
Trims can be supplied for a wide range of high temperature service. Non-metal seated trims are available in non-steam applications to 600 deg F. Metal seated designs for temperatures to 800 deg F are available.
FULL & REDUCED PORT
All valves NPS 2” and larger are available in full or reduced port. Special configurations and trim sizes are available for additional reduction or limiting Cv.
DOUBLE BLOCK & BLEED
Double Block and Bleed is available on any size and pressure class. A simple change to the core, adding a seal on both ends, will isolate the body cavity. The body can then be vented and checked for pressure buildup verifying the double block. In the event that a valve has trapped body pressure the self-relieving feature will equalize with the upstream side of the valve. An important differentiation between the Chromatic DBB and a standard ball valve is how it relieves this pressure. The standard double block and bleed valve is designed with self-relieving seats to the downstream side. If a standard ball valve has a leaking upstream seat, then upstream pressure can continually pass downstream. The HCV maintains its Reliable Mechanical Wedge Seal on the downstream side providing a more effective seat.