Pressure relief valve Farris Engineering

Series 3800
ASME NB Certified: Air, Steam & Water
European CE Approved
Sizes 1″ X 2″ to 12″ X 16″. Actual orifice areas from 0.15 to 109 square inches. Pressures
from 20 to 6170 psig. Temperature range of -450° F to +500° F. Steel body and
bonnet with stainless steel trim. Semi-nozzle design.
The “D” to “T” orifices meet API Standard 526 covering orifice areas and center-toface
dimensions. Full bore designs available with 1″ through 12″ inlets and orifice
areas from 0.719 to 109 square inches giving maximum capacity for a given inlet size.
All stainless snap acting and modulating non-flowing pilot controls minimize product
loss and provide maximum resistance to corrosion.
Standard O-ring elastomer seat main valve and pilot control minimizes fugitive emissions
and allows operation within 95% of set pressure. Materials include Viton®, Buna
N, ethylene propylene, silicone and Teflon®. Optional materials of construction include
complete 316 stainless steel.
Applications: air, steam, gas, vapor, and liquid services where maximum seat tightness,
operating pressures and precise adjustment are required. Excellent for natural
gas pipeline and compressor service.

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