Jordan Valve Mark 67 User Manual

	I & M Mark 67 (1/2” – 6”)
3170 Wasson Road • Cincinnati, OH 45209 USA	Installation & Maintenance Instructions for
Phone [phone] • Fax [phone]	Mark 67 Pressure Regulators
[e-mail] • www.jordanvalve.com

Warning: Jordan Valve pressure regulators must only be used, installed and repaired in accordance with these Installation & Maintenance Instructions. Observe all applicable public and company codes and regulations. In the event of leakage or other malfunction, call a qualified service person; continued operation may cause system failure or a general hazard. Before servicing any valve, disconnect, shut off, or bypass all pressurized fluid. Before disassembling a valve, be sure to release all spring tension.

Please read these instructions carefully!

Your Jordan Valve product will provide you with long, trouble-free service if it is correctly installed and maintained. Spending a few minutes now reading these instructions can save hours of trouble and downtime later. When making repairs, use only genuine Jordan Valve parts, available for immediate shipment from the factory.

Ideal Installation

				Main Steam Line
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		3
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													1.  Shut off Valve
													2.  Jordan Regulator
													3.  Strainer and Drain Valve
					1								4.  Pressure Gauge
							6
													5.  Relief Valve
	Condensate Return Line												6.  Steam Trap

1.To protect the valve from grit, scale, thread chips and other foreign matter, ALL pipelines and piping components should be blown out and thoroughly cleaned before the installation process begins.

2.Shutoff valves, pressure gauges and by-pass piping should be installed as indicated in the diagram to provide easier adjustment, operation, and testing.

3.A line strainer should be installed on the inlet side of the valve to protect it from grit, scale and other foreign matter. A 0.033 perforated screen is usually suitable for this purpose. Line strainers are available from Jordan Valve.

4.For best control, 3’0” straight sections of pipe should be installed on either side of the valve.

5.In preparing threaded pipe connections, care should be exercised to prevent pipe-sealing com-

pound from getting into pipelines. Pipe-sealing compound should be used sparingly, leaving the two end threads clean. Jordan uses, and recommends, thread sealer Teflon ribbon.

6.The flow arrow on the valve body must be pointed in the direction of flow. Ideally, the valve should be installed in the highest horizontal line of piping to provide drainage for inlet and outlet piping, to prevent water hammer, and to obtain faster response.

7.If possible, install a relief valve downstream from the valve. Set at 15 psi above the control point of the valve.

8.In hot vapor lines, upstream and downstream piping near the valve should be insulated to minimize condensation.

9.In gas service, expand the outlet piping at least one pipe size if the control pressure (downstream) is 25% of the inlet pressure or less. A standard tapered expander connected to the outlet of the valve is recommended.

10.Where surges are severe, a piping accumulator is recommended.

11.On steam control applications, install a steam trap with sufficient capacity to drain the coil or condenser. Be sure to have a good fall to the trap, and no backpressure. Best control is maintained if the coil or condenser is kept dry.

Control Line

A control line must be installed as follows:

1.Connect one end of a 3/8” tubing to the fitting under the diaphragm.

2.Connect the other end in a straight run of pipe 3 to 5 feet downstream of the valve.

3.DO NOT locate the control line tap in an elbow, swage or other changes in configuration of the pipeline where turbulence or abnormal velocities may occur.

4.DO NOT locate the control line tap in vessel, such as a deaerator located immediately downstream of the valve. Locate the tap in the pipeline leading to the vessel.

5.The control line should be sloped away from the valve.

6.Install a shutoff valve (not a needle valve) in the control line.

7.Install a pressure gauge in the control line or near the inlet of the valve to aid in setting the valve and checking for inlet pressure during maintenance procedures. (There is a 1/4” NPT tapped opening in the lower bonnet.)

Start-Up

With the inlet, outlet, and bypass shutoff valves closed, and no pressure in the downstream line:

1.Fully open the control line shut-off valve.

2.Fully open the outlet shut-off valve.

3.Slowly open the inlet shut-off valve.

4.Slowly open the inlet valve just enough to start flow through the valve. Observe the downstream pressure gauge. Increase the downstream pressure slowly by gradually opening the inlet valve.

5.Do not fully open the inlet valve until you are sure that the regulator has control of the system. Usually, the handwheel on the inlet valve will turn freely when this is achieved.

6.To change the controlled pressure, adjust the controlled pressure supplied to the top of the diaphragm.

7.Body and cap bolts should be re-tightened per torque procedures after valve reaches operating temperature.

Trouble Shooting

The first step in troubleshooting a piloted pressure regulator is to classify the action of the controlled pressure into one of the following categories:

A.Under Pressure: Controlled pressure too low; not enough flow or no flow through valve.

B.Over Pressure: Valve will not close or controlled pressure increases after valve closes.

C.Pressure Fluctuates: Controlled pressure rises and falls, will not settle out under low loads.

The next step is to determine what could cause the trouble. The third step is to locate and remedy the cause by the process of elimination. Make no assumptions and check the easy ones first. The guide below lists the controlled pressure action, common causes and procedure for checking each cause.

Controlled pressure action UNDER PRESSURE:

Valve undersized for application. Check capacity required and valve capacity.

Line strainer or pilot strainer screen clogged. Blow down strainers or visually check that they are clear.

Incorrect setting on range spring. Vary the setting and check response.

Main valve diaphragm ruptured. See action on main valve maintenance.

Malfunction of other piping components. Check for leaking traps and safety valves, inadvertently opened or closed valves.

Controlled pressure action OVER PRESSURE:

Incorrect setting on range spring. Vary the setting and check response.

Pilot valve or main valve seats leaking. Close inlet shut-off valve, allow downstream pressure to bleed off, close outlet valve and remove loading pressure tubing. Back out adjusting screw on pilot valve until free (both pilot and main valves are now closed.) Crack open inlet shut-off valve - if fluid issues from pilot valve port, the pilot seats are leaking. If the fluid issues from the main valve port, the main valve seats are leaking.

By-pass shut-off leaking. During period of leakage close outlet shut-off valve, observe downstream pressure gauge.

Bleed port in main valve clogged/partially clogged. Remove 1/2” NPT pipe plug in upper bonnet to gain access to bleed port and clean bleed port. Follow instructions in section “To Remove Main Diaphragm.”

Controlled Pressure Fluctuates:

Valve oversized. Check capacity required and valve capacity.

Maintenance

Caution: Ensure that the valve is de-pressurized before loosening any fittings or joints. The following steps are recommended before performing any maintenance on the valve:

1.Allow pressure to bleed off through the downstream piping. Do not attempt to reverse the flow through the valve by bleeding pressure from the upstream side of the valve.

2.When the pressure gauges indicate that all pres-

sure has been removed from the system, close the outlet shut-off valve and the valve may be serviced.

Note: Refer to the drawing at the end of this document for description and proper orientation of parts.

Pilot Valve

1.Remove the tubing between the pilot valve and the main valve.

2.Remove the pilot valve by unscrewing the mounting nipple from the main valve.

Remove Pilot Valve Diaphragm

1.Release the compression of the range spring by turning the adjusting screw counterclockwise until free.

2.Remove the housing screws (7), spring housing (3), spring guide (4), range spring (5), upper diaphragm plate (6), and diaphragm (8).

Remove Pilot Valve Seats

1.Release the bottom cap (15), the return spring (16), plug (17), stem (11), and strainer (not shown) will

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