Process Valves

Series 3800 Modulating Pilot Valve

Reduce product loss and fugitive emissions with the PCM non-flowing modulating pilot control from Farris Engineering.
The PCM Modulating Control offers a variety of features and benefits. It opens in proportion to the overpressure to minimize fugitive emissions and product loss as well as to reduce noise. The PCM also reduces the shock loads to vessels and piping systems due to valve actuation. Its set pressure is not affected by constant or variable backpressure. In addition, the PCM Modulating Control can be directly interchanged with our PCF5 snap acting controls in the field for both cost and time savings.

Modulating Pilot Valves:

  • Sizes 1″ x 2″ through 8″ x 10″
  • Set pressure from 15 to 2220 psig
  • ASME NB Certified for air, gas, vapor and liquid service
  • Convertible to NACE compliant materials

 

Farris Process Valves
2600 Series ASME NB Certified: Air, Steam & WaterSizes 1″ x 2″ to 20″ x 24″. Effective orifice areas from 0.110 to 159 square inches. Pressures from 15 psig to 6000 psig. Temperature range of -450 °F to +1500 °F. Steel body and bonnet with stainless steel trim. Optional Balanced Bellows design isolates working parts and top-works from fouling or corrosive service and nullifies the effects of back pressure on valve performance. The “D” to “T” orifices meet API standard 526 covering orifice areas and center to face dimensions. Super capacity types range from “W” (57.26 square inches) to “Z” (159 square inches) orifices and have a maximum set pressure limit of 300 psig. Optional materials of construction include complete 316 stainless steel, Monel, and Hastelloy C. Also available with materials in compliance with NACE standards. Higher temperature models use chrome moly body and bonnet. Optional “O” ring elastomer seat available for maximum tightness. Applications: Air, steam, gas, vapor, and liquid process applications.
2600 Series ASME NB Certified Catalogue – Click to download.2700 Series ASME NB Certified: Air, Steam, & Water

2700Sizes ½” x 1″ to 1½” x 2½”. Orifice areas from 0.068 to 0.573 square inches. Pressures from 15 psig to 6500 psig. Temperature range of -400 °F to +750 °F conventional and balanced design.

Stainless steel body and trim, carbon steel bonnet. Optional materials include complete 316 stainless steel, Monel, and Hastelloy C. Materials suitable for NACE service available.

Available with screwed, flanged, socket weld or welding nipple connections. Optional “O” ring seat for ultimate tightness. Maximum blow down of 10 to 20% on all fluids.

Applications: Air, gas, vapor, and liquid process applications.

 

2700 Series Catalogue – Click to download.

3800 Series 

ASME NB Certified: Air, Water & Steam 

3800

Sizes 1″ x 2″ to 12″ x 16″. Orifice areas from 0.110 to 109 square inches. Pressures from 15 psig to 6,170 psig. Temperature range of -400 °F to +450 °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 to face 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 and modulating size. All stainless, non-flowing pilot controls minimizes product loss and provides maximum resistance to corrosion. Available in Snap Acting or Modulating designs. 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, gas, vapor, liquid and steam services where maximum seat tightness, operating pressures and precise adjustment are required. Excellent for natural gas pipeline and compressor service.

2850 Series

ASME NB Certified: Air & Steam
2850Sizes ¾” x 1″ to 1½” x 2″. Effective orifice areas from .098 to 1.048 square inches. Pressures from 15 psig to 300 psig. Temperature range of -400 °F to +750 °F. Materials of construction include stainless steel body and trim.

Applications: Air, steam, gas, vapor and non-Code liquid applications where the service is compatible with stainless steel (type 2850) or brass and bronze (type 2856). Also suitable for cryogenic applications.

2850 Series Catalogue – Click to download.

 1890 Series

ASME NB Certified: Air, Steam, & Water

Sizes ½” x 1″ & ¾” x 1″. Effective orifice areas of .077 (liquid) and .089 (vapor) square inches. Pressures from 15 psig to 800 psig. Temperature range from -400 °F to +750 °F. Materials of construction include stainless steel body and trim.

Applications: Air, steam, gas, vapor and liquid process applications (type 1890).

1890 Series Catalogue – Click to download.