166-5-6 Instruction Manual

Types 166-5 & 6

Fisher Controls

Instruction Manual

Type 166-5 & 6 Regulators

July 1969 GATE VALVE

REMOTE VENT

BY PASS LINE

Dwg. AJ2839

the vent from the regulator. A line is installed from this connection to the outdoors, and the vent fitting inserted in the end of the line. The remote vent line should be as short as possible with a minimum number of elbows. The pipe should be of the largest practical diameter.

START-UP

CONTROL LINE NEEDLE VALVE

MANUAL CONTROL VALVE

Form 1698C

MANUAL CONTROL VALVE

Figure 1. Typical Installation, Type 166-5 or 6.

TYPE NUMBER EXPLANATION

Type 166-5—Industrial gas regulator suitable for inlet pressures up to 125 psi.* Outlet pressure range is 4" w.c. to 2 psi (5 springs) for 11/16" and 1" orifices.

Type 166-6—Same as 166-5 except outlet pressure range is 2 to 10 psi (2 springs). *For maximum regulator accuracy the inlet pressure should be limited to 60 psi for the 1" orifice.

INSTALLATION

Inspect all parts of the regulator for foreign material that may have collected during shipment, and clean and blow out pipe lines to remove pipe scale and chips. It is recommended that a strainer, such as a Fisher Type 260C, be installed ahead of the main valve. Install the body in the line so that flow is in the direction indicated by the arrow cast on the body.

Figure 1 shows a typical 166 installation. If it is desirable to have continuous operation during regulator maintenance, install a three valve by-pass around the regulator. The downstream piping may be enlarged to obtain maximum capacity.

If the body has screwed connections, use a good grade of pipe compound on the male theads.

If the body is of flanged construction, draw the flange bolts up evenly.

Connect a 3/4" control line from the tap in the lower casing to a straight run of pipe 6 to 8 pipe diameters downstream from the regulator, or any swage fittings. Install a needle valve in this line so the control pressure can be shut off. The needle valve can also be used to dampen out pulsations which may cause instability.

The vent should be piped outdoors when the regulator is installed indoors, as illustrated in Figure 1. For remote vent installation, unscrew

To put the regulator in operation: 1. Open the needle valve in the control line.

2. Slowly open downstream manual control valve.

3. Slowly open upstream manual control valve.

4. Close by-pass valve.

5. If the regulator has a tendency to pulsate, pinch down the needle valve in the control line. This valve should never be completely closed while the control valve is in operation.

6. Inspect all pipe connections for leaks.

ADJUSTMENT

It is possible to change the reduced pressure setting of the regulator within the specified pressure range stamped on the pressure range plate attached to the rim of the spring case. Observe the maximum inlet pressure figure given on this plate.

To change the reduced pressure setting, remove the closing cap (Key No. 1, Type 166-5) or the adjusting screw cap (Key No. 55, Type 166-6), and turn the adjusting screw (Key No. 3) clockwise to increase, or counterclockwise to reduce the pressure setting.

MAINTENANCE

Series 166 regulators should respond to downstream pressure changes with high sensitivity and accuracy. If this type of action is not being obtained, check the following: 1. Valve Plug—Examine the valve disks and seat rings for damage. If the synthetic rubber valve disks are damaged, they must be replaced.

2. Diaphragm—If the diaphragm is no longer pliable or is ruptured, it will have to be replaced.

TO REPLACE VALVE DISKS

The rubber valve disks on the Type 166-5 and 6 regulators may be replaced without removing the regulator from the pipeline. To examine or replace the disks, follow this procedure. (See Figure 2) 1. Isolate the regulator in the pipeline.

Types 166-5 & 6 2. Remove the closing cap (Key No. 1), and relieve the spring tension by turning the adjusting screw (Key No. 3) out of the spring case. On the 166-6, this is done by removing the adjusting screw cap and backing off the adjusting screw.

On the 166-5, removing the closing cap exposes the adjusting screw.

3. Remove the bottom flange (Key No. 37).

4. Loosen the set screws (Key No. 36) in the cage assembly (Key No. 34) and unscrew the cage and valve plug assembly from the valve body.

5. Remove the lower elastic stop nut, (Key No. 38), and anti-rotation bar (Key No. 33). Note: This must be done even if valve disks and “O” rings are inspected only, and not replaced.

6. Remove valve stem nut (Key No. 32) and lower disk holder, “O” ring, lower disk, and lower disk retainer will drop off the valve stem (Key No. 27).

7. Upper elastic stop nut can then be removed so that the upper disk retainer (Key No. 30), “O” ring (Key No. 19), upper disk (Key No. 28), and upper disk holder (Key No. 29) will drop off the valve stem.

8. Replace valve disks and “O” rings.

9. To reassemble valve plug, place upper disk holder, “O” ring, upper valve disk, and upper disk retainer on valve stem. Secure with upper elastic stop nut.

10. Place valve stem in cage (Key No. 34) and install lower disk retainer, lower valve disk, “O” ring, and lower disk holder on valve stem. Secure with valve stem nut (Key No. 32).

11. Replace “O” ring (Key No. 35) on cage assembly. Lubricate “O” ring on the cage with Dow Corning No. 3 or any suitable rubber lubricant. Use a small amount of Never-Seez or equivalent on male threads of the cage.

12. Turn the cage assembly completely into the body (Do not tighten). Screw the valve stem (Key No. 27) into the diaphragm rod (Key No. 18) until the upper elastic stop nut on the valve plug assembly shoulders against the diaphragm rod. (Do not tighten) 13. To make the seat-to-seat spacing adjustment, the upper valve disk (Key No. 28) is held against the upper valve seat (Key No. 31), and the cage is turned out of the body until the lower valve seat contacts the lower valve disk.

14. Lock the seat-to-seat adjustment by tightening the set screws (Key No. 36) in the cage against the body.

15. Rotate the valve plug assembly counterclockwise until the milled slot in the valve stem lines up with the cast slot in the cage.

16. Install the anti-rotation bar (Key No. 33) and secure in place with the lower elastic stop nut, (Key No. 38).

17. Replace the bottom flange and adjust the spring tension to the desired outlet pressure.

TO REPLACE DIAPHRAGM

If the diaphragm needs to be replaced, it can be done with the body in the line, and without disturbing the seat-to-seat adjustment. (See Figure 2)

2

1. Isolate the regulator in the line.

2. Remove the closing cap (Key No. 1). On Type 166-6, the adjusting screw cap (Key No. 55, Fig. 2) first has to be removed.

3. On the Type 166-5, turn the spring adjustor (Key No. 3) out of the spring casing, and spring (Key No. 5). On the 166-6 back off the adjusting screw.

4. Remove the cap screws and nuts (Key Nos. 11 and 12) which hold the spring case to the diaphragm case. Lift the spring case off the assembly.

5. Grasp the diaphragm (Key No. 15) and the diaphragm head, and rotate the assembly counterclockwise until the diaphragm rod (Key No. 18) unscrews from the valve plug stem.

6. The diaphragm head and rod assembly can now be lifted out of the case.

7. Hold the diaphragm rod (Key No. 18) from turning, and unscrew the elastic stop nut (Key No. 17).

Remove the lower spring seat (Key No. 13), and the diaphragm head, exposing the diaphragm (Key No. 15).

8. Replace diaphragm, diaphragm head, lower spring seat, and secure with elastic stop nut.

9. When the diaphragm rod was unscrewed from the valve stem, the valve stem assembly dropped into the bottom of the valve body.

10. Remove the bottom flange (Key No. 37), and push the plug and stem assembly up, so that the threads on the diaphragm rod and the stem engage. Screw up, so that Key No. 18 shoulders against the nut (Key No. 38). Do not tighten.

11. Replace the bottom flange.

12. Now rotate the diaphragm assembly counterclockwise, until the holes in the perimeter of the diaphragm line up with the holes in the diaphragm case.

13. Replace the spring case, spring, upper spring seat, and adjusting screw. Adjust the pressure setting of the regulator. Replace closing cap or the adjusting screw cap.

TO REPLACE SEAT RINGS (See Figure 2)

Refer to section “TO REPLACE VALVE DISKS”, and remove the valve cage and plug as outlined in Steps 1 through 6. To replace the lower seat ring, unscrew it from the valve cage. Now refer to section “TO REPLACE DIAPHRAGM”, and proceed through Step 6. To remove the upper seat ring, continue as follows: 1. Remove the cap screws (Key No. 23) holding the lower diaphragm case (Key No. 10) to the body.

2. The diaphragm case can now be removed, so that the seat ring is exposed.

3. Using a suitable socket, remove the upper seat ring (Key No. 31).

4. Reassemble, referring again to sections “TO REMOVE VALVE DISKS”, Steps 9 through 17, and “TO REPLACE DIAPHRAGM”, Steps 8, 12 and 13.

SERIAL NUMBER

Always refer to the serial number stamped on the nameplate in correspondence with the factory or sales representative about this equipment.

When ordering parts, be sure to include the complete part number of the desired parts.

Types 166-5 & 6

Parts Reference

NS

DC

NS

NS

DC NS

NS

Figure 2.

Type 166-5.

Dwg. DN1519

VENT ASSEMBLY

PARTS NOT SHOWN 39, 40 NS-NEVER-SEEZ DC-DOW CORNING NO. 3 APPLY NEVER-SEEZ TO FACES OF GASKET PART NO. 22

View showing closing cap and adjusting screw construction of 166-6.

KEY

PART NUMBER

1 1L9283 1801 1N7564 1401 2* 3

1N4462 0699

PART NAME Closing Cap Type 166-5 Type 166-6

MATERIAL Aluminum Brass Neoprene

1L9286 0801 1A2791 2898

Closing Cap Gasket Adjusting Screw Type 166-5 Type 166-6 Spring, Type 166-5 4" - 5.5" W.C. 5" - 11" W.C. 10" - 16" W.C. 13" - 28" W.C. 3/4 - 2 psig

Steel, CD PL

1D8925 1D7707 1D8928 1D8929 0B0196

5 000A 000A 000A 000A 000A

* Recommended Spare Part.

Aluminum Steel, CD PL

3

Types 166-5 & 6 PART NUMBER

5

6 10 11 12 13

14 15* 16 17 18 19* 22* 23 26

0Y0664 1H8024 1H9769 3N1530 1B1363 1A3093

000A 000A 000A 000A 2405 2412

0X0147 4401 1J3313 1401 1D4757 2506 1N1508 0205 1H7231 2507 1N1509 1199 1N1510 3503 1H9948 0699 1K4365 0402 1C3791 2405 2K4366 2K4368 2K4367 2N3436

1901 1901 1901 1902

2R4933 2R4931 2R4932 2R4934 1H9929 1P8093 1P8091

2201 2201 2201 2201 3503 000A 0901

26

27 28* 29 30

1N1514 0901 1P8092 0901 31

32 33 34 35* 36 37 38 39 40 41 42 48 49 50 51 52 53 54 55

1N1516 0902 1N1516 3507 1N1515 0902 1N1515 3507 1H9934 0901 1H9935 3899 2H9936 0712 1H9938 0699 1A3321 2898 1K4370 1901 1R4939 2201 1N1517 1199 1H9916 1899 1H9917 1899 1B7877 2405 1F9904 2898 1N1518 1004 1N1521 0901 AF5504 000A 1J3312 1401 1A3524 2412 1D7936 2415 1J9440 0402 1J9441 1401

PART NAME Spring, Type 166-6 2 - 5 psig 5 - 10 psig Spring Case Assembly Lower Diaphragm Case Cap Screw, 12 Req'd Hex Nut, 12 Req'd Lower Spring Seat Type 166-5 Type 166-6 Lower Diaphragm Plate Diaphragm Washer, Type 166-5 Elastic Stop Nut Diaphragm Rod O-Ring, 3 Req'd Flange Gasket, 2 Req'd Cap Screw, 6 Req'd Valve Body 1-1/2" Screwed 2" Screwed 2" 125 lb. Flanged 2" 250 lb. Flanged Valve Body 1-1/2" Screwed 2" Screwed 150 lb. Flanged 300 lb. Flanged Valve Stem Disc Assembly, 2 Req'd Disc Holder, 2 Req'd Disc Retainer, 2 Req'd 11/16" Orifice 1" Orifice Seat Ring, 2 Req'd 11/16" Orifice 11/16" Orifice 1" Orifice 1" Orifice Valve Stem Nut, Type 166-5 Valve Stem Locking Arm Cage O-Ring Screw, 2 Req'd Bottom Flange Bottom Flange Stop Nut, 2 Req-d Nameplate, Type & Serial No. (Not Shown) Nameplate, Pressure Rating (Not Shown) Cap Screw, 6 Req'd Washer Upper Diaphragm Plate Vent Restriction Vent Upper Spring Seat, Type 166-6 (Not Shown) Nut, Type 166-6 Washer, 6 Req'd Gasket, Type 166-6 Adjusting Screw Cap, Type 166-6

MATERIAL Steel, CD PL

Sub-Assembly Sub-Assembly Steel, CD PL Steel, CD PL Zinc Brass Zinc Plated Steel Buna N Steel, CD PL Aluminum SST Syn. Rubber Asbestos Steel, CD PL Cast Iron

Steel

SST Alum. & Syn. Rubber Aluminum Aluminum

Aluminum SST Aluminum SST Aluminum SST Aluminim Syn. Rubber Steel, CD PL Cast Iron Steel Aluminum Brass, Chrome Pl. Brass, Chrome Pl. Steel, CD PL Steel Aluminum Aluminum Sub-Assembly Brass Steel, CD PL Steel, CD PL Asbestos Brass

* Recommended Spare Part.

While this information is presented in good faith and believed to be accurate, Fisher Controls does not guarantee satisfactory results from reliance upon such information. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding the performance,

Fisher Controls

merchantability, fitness or any other matter with respect to the products, nor as a recommendation to use any product or process in conflict with any patent. Fisher Controls reserves the right, without notice, to alter or improve the designs or specifications of the products described herein.

For Information write: P.O. Box 190, Marshalltown, Iowa 50158, U.S.A. or Brenchley House, Maidstone, Kent ME 14 1UQ, England

Printed in U.S.A.

KEY