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Pressure Transmitter Manifold
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Typical Installations
PTM4U Typical Installations
  • Direct mounting to a 2" pipe:
    Allows completion of all piping, fittings and pressure testing without the instrument. Provides convenient and safe removal of the instrument without disturbing the process lines, connections or mounting.
  • 1/4" FNPT instrument test / vent connection with S.S. bleed valve at the highest point
  • One piece barstock construction
  • Straight-thru 3/16" roddable ports
  • Bonnetless construction utilizes a unique tapered plug inner valve
  • Adjustable packing nut stops interport and stem leakage
  • Directional 90 degree turn arrowhead handle
  • Optional integral steam heating system
  • Optional test / vent valve with 1/4" FNPT outlet to replace standard bleed valve
  • Flanged instrument x flanged process connections provide universal versatility in combination with D/A adapter flanges

The UNIMOUNT model PTM4U is a universal mounting unit which excels in the ability to perform as both a multi-function manifold and a sturdy instrument mounting system for pressure transmitters, switches or gauges. With the added versatility of D/A's unique series of Adapter Flange connectors, the PTM4U becomes a truly universal fit-all unit.

The D/A UNIMOUNT - Adding an Extra Dimension of Compactness, Simplicity, Convenience, Versatility and Adaptablity to Pressure Instrument Manifolding.

Normal Mode
Normal Mode

Isolation Mode
Isolation Mode
Normal Mode
With the valve handle in the NORMAL position, the PTM4U is in the normal mode with the process inlet open to the instrument.
Isolation Mode
By dialing the valve handle to the BLOCKED position, the PTM4U is switched to the isolation mode which blocks the process to the instrument. The bleed valve can now be opened to depressurize the instrument for safe removal or servicing. Note that this isolation function will not interfere with continuous purging of the process line.
Max Ratings:
  6000psi @ -150ºF to 150ºF
  3500psi @ 220ºF
  6000psi @ 325ºF
  2500psi @ 520ºF
 Flanged instrument x Flanged process
Design Codes:

ANSI B31.1, B16.5, NACE MR-01-75(special order)
Material Codes:
Barstock, A479 - 316, A276-316;
Cast, ASTM-A743 CF3M, ASTM-A-351 CF3M, A 276-316.
Materials of Construction:
 Body: 316SS or nickel plated C.S.
 Wetted Plug: 316SS
 Plug Liner: Teflon or Ryton reinforced Teflon
 Face Seals: Ryton reinforced Teflon
 Non-Wetted Trim: 303SS
 Handle: Cast aluminum arrowhead - PVC coated
 Nameplate: SS embossed
 Plug/Bleed Valve: 303SS

Exotic materials: Hastelloy C, Monel, Alloy 20, etc. consult factory.
All units are supplied with 4 transmitter mounting bolts, 2 face seals and 2 U-bolts.
Assurance of Satisfaction: When properly installed, D/A guarantees the PTM4U to be free from defective workmanship and material under normal use and service for a period of one year from date of shipment.

Code  Dial-A-Function, Unimount pressure manifold
PTM4U  Flanged (instrument) x Flanged (process)
| Code   Plug Liner
| T  Teflon
| R  Ryton reinforced Teflon
| | Code  Body
| | S  Stainless Steel, 316
| | C  Nickel Plated C.S.
| | | Code  Wetted Plug
| | | S  Stainless Steel, 316
| | | | Code  Options
| | | | ALH  Arrowhead Locking Handle
| | | | ITV  Instrument Test Valve
| | | | SH  Integral Steam Heating System
| | | | SP  1/4" Purge Port, side, plugged
| | | | RO  Rod Out connections
| | | | |  
Model Number


D/A Manufacturing Co., Inc.
Hwy 86 East or P.O. Box T
Tulia, TX  79088-0920 USA
Phone: (806)995-2316
FAX: (806)995-4601