The D/A MINIMATIC series of "3-valve" manifolds perform all the necessary functions of a 3-valve system by utilizing two 3-way valves working together instead of three independent 2-way valves. This sensible concept allows the operator to simply dial NORMAL, ZERO or BLOCKED with a 90 degree turn of the handle rather than manipulating a cluster of independent valves. Because the unique design of the MINIMATIC properly groups and interlocks the porting to provide automatic, fool-proof sequencing, it can drastically reduce the costly errors of improper operation inherent in 3-valve systems resulting in steam damaged transmitters, plugged tap lines and flushed out winterizing.
The D/A MINIMATIC - Adding an Extra Dimension of Simplicity, Convenience and Safety to Instrument Manifolding.
Note: Because of the unique fool-proof design, the Zeroing Valve and Blocking Valve handles can be dialed to their respective positions in any order without causing improper operation.
With both valve handles in the normal position, the MM4B is in the service mode with both process inlets open and the equalizing port blocked.
By dialing the Zeroing Valve handle to the ZERO position, the MM4B is automatically switched to the zeroing mode which completely and properly prepares the transmitter for zeroing by (1)first blocking one inlet impulse line and (2) then opening the equalizing port which bypasses the blocked inlet to equalize the P cell at process pressure. Because it basically operates like a 3-way valve, this forced zeroing sequence provides fool-proof operation and safety. After correcting for zero offset, the transmitter is returned to service by simply redialing the handle to the NORMAL position which, again, correctly sequences back to the service mode by closing the equalizer first and then reopening the blocked inlet.
By dialing the Zeroing Valve and Blocking Valve handles to the ZERO and BLOCKED positions respectively, the MM4B is automatically switched to the islolation mode where both inlets are blocked and the equalizing port is closed. The transmitter is now safely isolated and prepared for field servicing, recalibration or removal. The transmitter is returned to service by simply redialing the handles to their NORMAL positions which, again, correctly sequences back to the service mode by leaving the equalizer blocked and reopening both inlets.
6000psi @ -150ºF to 150ºF
3500psi @ 220ºF
6000psi @ 325ºF
2500psi @ 520ºF
Flanged instrument x 1/2" FNPT process
ANSI B31.1, B16.5, NACE MR-01-75(special order)
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
Mounting Bolts:Carbon Steel, Zinc plated
Exotic materials: Hastelloy C, Monel, Alloy 20, etc. consult factory.
All units are supplied with 4 transmitter mounting bolts and
2 face seals.|
Assurance of Satisfaction: When properly installed, D/A guarantees the MM4B to be free from defective workmanship and material under normal use and service for a period of one year from date of shipment.