Model PTR-1

Description

Model PTR-1 is high performance, pressure loaded diaphragm-type, flow-to-open pressure reducing regulator. Design includes an internal pressure balancing pistoncylinder that provides high flow capacity and high pressure drop capability. Performance meets or exceeds that of competitive pressure loaded or pilot-operated designs. A back pressure regulator or "unloader" is piped to the top of the dome and is "set" to control the outlet pressure of the pressure reducing regulator. In addition, a low temperature probe (pneumatic controller) with an integral, rigid insertion bulb and invar rod is installed up-stream of the Model PTR-1. When the exposed outer sheath sense a change in the process temperature below the minimum temperature set point of the probe, it vents loading pressure from the dome of the regulator and allows it to close.

Inlet Design Pressure

• Up to 700 psig (48.2 Barg)

Outlet Pressure

• 2.0 - 400 psig (0.13 - 27.6 Barg)
• Multiple springs - ranges dependent on selection of the unloader

Line Sizes

• 1/2" (DN15)
• 3/4" (DN20)
• 1" (DN25)
• 1-1/4" (DN32)
• 1-1/2" (DN40)
• 2" (DN50)
• 2-1/2" (DN65)
• 3" (DN80)
• 4" (DN100)

End Connections

• Standard: Female NPT
• ASME Flanged: 150#, 300#, 600#
• DIN Flanged: PN16, PN25, PN40
  • (Integral Flanged Body unless listed under Opt.-30)
• Opt-31: British Standard Pipe Threads

Material Combinations: Body / Cover Dome

• BRZ/BRZ
• SST/SST

BRZ = Bronze
SST = Stainless Steel 

Features

• Versatile: Two basic materials and multiple trim material combinations to select from.
• Tight Shutoff: Multiple composition materials provide Class IV or VI inboard leakage rates. Designed as a soft-seated valve.
• Capacity: Highest in the industry. Allows smaller body sizes than competitors in a majority of applications.
• Droop: Highly accurate outlet pressure control, due to absence of range spring in design, provides almost zero “droop effect”.
• Trim Design: FTO and pressure balancing for higher inlet pressure. Results in unmatched sensitivity and stability. Internals are cage-contained within easily removable quick change trim.
• Rangeability: Basic valve gives outstanding rangeability due to close tolerances, balanced trim, and a broad range of elastomeric and metallic diaphragms and soft seats. Can be as high as 2000:1.
• Heavy-Duty Guiding: Both top and bottom guided to maintain stability and increased diaphragm life.
• Failure Position: Fails closed on loss of loading pressure.