CRYOGENIC BALL VALVES
VALVE DESCRIPTION
Perar has specialised in Low Temperature and Cryogenic service to the extreme temperature of minus 196 Deg C, in accordance to the most stringent specifications. Perar Ball Valves in cryogenic service are supplied with extended bonnet with a sufficient gas column length (vapour space) to keep the stem seals exposed only to vapour and not the cold liquid to ensure functional integrity. Suitable seals are selected considering the customer’s process indication. PTFE lip seal spring energised or KEL-F are commonly used.
BASIC CHARACTERISTICS
- API 6D, API 6A design
- Full Bore and Reduced Bore design
- Flanged or Welding Ends
- Spring loaded floating seats
- Bi‐directional sealing
- Anti blow‐out stem
- Anti static device
- Heavy duty bearings
- Double Block & Bleed design
- Fire safe design
Sizes & Perar Specifications:
From 1/2″ up to 60″
Classes:
ANSI 150-300-600-900-1500-2500
API 2000-3000-5000-10000-15000
Materials:
Low Temperature Carbon Steel, Stainless Steel.
Soft Seating Standard
Manual operated or Actuated Standard
Metal Seating On Request
Stem Extension On Request
Self‐relieving Seats Standard
Extended Bonnet On Request
Double Piston Effect Seats On Request
Welded Pups On Request
Vent & Drain ports Standard
Sealing Areas Overlay On Request
Emergency sealant injection On Request for 6” FB and above
Wetted Areas Overlay On Request
BODY, CLOSURE
– CS (ASTM A105), LTCS (ASTM A350 LF2)
– High strength LTCS (A694 F52, F60, F65)
– Austenitic SS (ASTM A182 F304, F316)
– Duplex SS 22% Cr (ASTM A182 F51)
– Superduplex SS 25% Cr (ASTM A182 F53/F55)
– 6Mo SS (ASTM A182 F44)
– Inconel 625
– Incoloy 825
– Monel
BODY SEALS / SEAT SEALS
– Viton A FKM O‐ring
– Viton GLT FKM O‐ring
– Viton AED FKM O‐ring
– HNBR AED O‐ring
– FFKM O‐ring
– PTFE + ELGILOY Lip‐Seals
– Graphite Packing / Gaskets
TRIM (SEAT, BALL and STEM)
– CS (ASTM A105), LTCS (ASTM A350 LF2) + ENP 0.003”
– High strength LTCS (A694 F52, F60, F65) + ENP 0.003”
– AISI 410 Martensitic SS (ASTM A182 F6a)
– 17‐4 PH
– Austenitic SS (ASTM A182 F304, F316)
– Duplex SS 22% Cr (ASTM A182 F51)
– Superduplex SS 25% Cr (ASTM A182 F53/F55)
– 6Mo SS (ASTM A182 F44)
– Inconel 625
– Inconel 718
– Incoloy 825
– Monel
SEAT INSERT
– Viton A/GLT/AED FKM (only EB model)
– HNBR (only EB model)
– PTFE / RPTFE
– Nylon / DEVLON V
– PCTFE / KEL‐F
– PEEK
– METAL with either TUNGSTEN CARBIDE or
– CHROMIUM CARBIDE COATING (0.15 mm min. thk.)
BOLTING
– ASTM A193 B7/B7M, ASTM A320 L7/L7M,
– A193/A320 B8/B8M
– UNS S31803, UNS S32760, ASTM A453‐GR.660
This is a text block. Click the edit button to change this text..