Mark 687 Soft Seated Piloted Pressure Regulator.  Jordan Valve is proud to announce the introduction of the Mark 687 Piloted Pressure Regulator. It is the latest addition to our soft seated regulator offering. This is a milestone for Jordan Valve as the Mark 687 is our first piloted regulator that offers ANSI Class VI shutoff! Mark 687 regulators provide accurate pressure control in a variety of services including gas, air, water, oil and chemicals. This regulator is used with a 69H or 69L pilot.The Mark 687 is extremely accurate. The pilot senses system changes and positions the main valve for precise control.FunctionThe main valve of the Mark 687 is normally closed.
The upstream pressure (P1) enters the main valve body and passes through the piping to the pilot valve.The pilot valve is normally open, allowing the upstream pressure to move through the outlet port of the pilot valve to act on the bottom of the main valve diaphragm. This force pushes the stem upward, opening the main valve.As the downstream pressure rises to the setpoint, the pilot senses the rising pressure and begins to close. This throttles the flow to the main diaphragm. The pressure on the main valve diaphragm is bled off downstream and the main valve closes.In this way, the Mark 687 modulates between open and closed to maintain control.FeaturesSoft seat for ANSI Class VI ShutoffBalanced plug and piloted operation for extremely accurate regulationChoose from two pilot valves, 69L or 69H. These provide a variety of ranges, from 2-8 psi (0, 14-0,55 bar) to 70-150 psi (4,8-10,3 bar).

316SS / PTFE Trim is standard


Sizes: 1-1/2″ (DN40) through 2″ (DN50)

End Connections

Threaded – FNPT, BSPT, BSPP
ANSI Flanges – 150#, 300#
DIN Flanges – PN 10/16, PN 25/40
Others available on request

Body Materials

Carbon Steel – ASME SA216 WCB
Stainless Steel – ASME SA351 CF8M
Trim Material: 316SS/PTFE (Standard on all valves)

Seat Material: 316SS /PTFE

Actuator Materials

Carbon Steel for WCB bodies
Electroless Nickel Plated Carbon Steel for CF8M bodies
Diaphragm Material: Buna-N

Service: Water, oil, gas, air and chemicals

Shutoff: ANSI Class VI

Available Spring Ranges

MK69L Low Pressure Pilot: 2-8 psi (0,14-0,55 bar), 5-30 psi (0,34-2,1 bar), 15-50 psi (1,0-3,5 bar)
MK69H High Pressure Pilot: 25-75 psi (1,7-5,2 bar), 70-150 psi (4,8-10,3 bar)

Minimum & Maximum Pressure Drop

Minimum: 25 psi (1,7 bar)
Maximum: 150 psi (10,3 bar)
Pressure Temperature Ratings: Maximum inlet 175 psi @ 100°F (12,1 bar @ 38°C); 175 psi @ 275°F (12,1 bar @ 38°C)

Flow Coefficients

1-1/2″ Valves: 45 Cv
2″ Valves: 45 Cv

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