Type 6358, 6365, & 6365C
Fisher Controls
Instruction Manual
Type 6358, 6365, & 6365C Relief Pilots
December 1986
Form 5211
Introduction
Scope of this Manual This instruction manual includes installation maintenance, and parts information for the Type 6358, 6365, and 6365C relief pilots. For installation and operation of a complete relief valve assembly, refer to separate manuals (such as the one for a Type 63EG, 289P, 1805P, or 1808 relief valve).
Description
W3716
TYPE 6358 RELIEF PILOT MOUNTED ON TYPE 1808 MAIN VALVE
A single Type 6358 or 6365 pilot is used on the main valve body of a relief valve as shown in figure 1. A Type 6365C cascade pilot is used along with a Type 6365 pilot to reduce the buildup required for the main valve to go wide open. The Type 6358 pilot bleeds only when the main valve is stroking open. The Type 6365 and 6365C pilots bleed only when the main valve inlet pressure is above the Type 6365 set pressure. These pilots have unbalanced plugs and can be used in both liquid and gas service.
Specifications Table 1 lists specifications for various Type 6358, 6365, and 6365C pilot constructions. For each pilot (except the Type 6358 pilot, which has a plugged restriction), the restriction diameter is indicated by a letter stamped on the bottom of the pilot body next to the tapped side outlet. The pilot spring range appears on the pilot spring case.
W3709
TYPE 6365 RELIEF PILOT MOUNTED ON TYPE 63EG MAIN VALVE
Figure 1. Typical Relief Pilot Constructions
ŠFisher Controls International, Inc., 1983, 1986; All Rights Reserved
Type 6358, 6365, & 6365C Table 1. Specifictions
MAXIMUM RELIEF (INLET) PRESSURE(1) (INCLUDING BUILDUP) TYPE 6358 PILOT SET PRESSURE(2) RANGE
Depends upon maximum inlet pressure for complete relief valve as specified in appropriate manual RANGE Psig Bar 3 TO 40 0.21 TO 2.8 3 TO 125 0.21 TO 8.6
CONTROL SPRING COLOR CODE Yellow Red
TYPE 6365 PILOT SET PRESSURE(2) RANGE RANGE Psig
Bar
CONTROL SPRING COLOR CODE(3)
Without diaphragm limiter
1/2 to 2 2 to 10 3 to 40 35 to 125 85 to 200
0.034 to 0.14 0.14 to 0.69 0.21 to 2.8 2.4 to 8.6 5.9 to 144
Yellow Black Yellow Red Blue
With diaphragm limiter
175 to 220 200 to 300
12 to 15 14 to 21
Blue Green
CONSTRUCTION
TYPE 6365C PILOT SET PRESSURE RANGE
Nonadjustable; addition of cascade pilot to Type 6365 pilot does not affect Type 6365 pilot set pressure range
1. The pressure/temperature limits in this manual and any applicable standard or code limitations must not be exceeded.
Installation
RESTRICTION
TYPE NUMBER
GAIN
6358
Standard
6365 with 2 lowest spring ranges
6365 with 5 highest spring ranges
6365C
Color Letter Code Code
Drill Size
No (restriction nole is plugged)
None
None
None
Standard
Yes
Yellow
H
No. 70
Optional lower gain
Yes
Red
S
No. 57
Standard
Yes
Red
S
No. 57
Optional low gain for liquid service
Yes
Blue
L
No. 47
Optional high gain
Yes
Yellow
H
No. 70
Standard
Yes
Red
S
No. 57
Used
MATERIAL TEMPERATURE CAPABILITIES(1)
- 20 to 150°F ( - 29 to 66°C)
PRESSURE CONNECTIONS
1/4 inch NPT female
APPROXIMATE WEIGHT
2 pounds (1kg)
2. Set pressure is defined as the pressure at which the pilot starts to discharge. 3. Control spring part numbers are given in the parts list.
Note
WARNING Installing a pilot where its capabilities, or those of any downstream equipment, can be exceeded may cause personal injury, property damage, or leaking due to bursting of pressure-containing parts or explosion of accumulated gas or liquid. To avoid this, install these pilots where: • Service conditions are within pilot capabilities (including those in table 1), • Installations comply with appropriate codes and regulations, and • The unit is protected from physical damage and corrosive substances. 1. Only personnel qualified through training and experience should install, operate, and maintain a pilot. Before installing, inspect the pilot for any damage and foreign material that may have collected in the body.
2
PILOT RESTRICTIONS
If the pilot is shipped mounted on a main valve, install the main valve according to the appropriate instruction manual 2. For a pilot that is shipped separately, make sure that there is no damage to, or foreign material in, the filter and that all tubing and piping have been cleaned. Install the pilot so that flow is from the IN to the OUT connection as marked on the pilot body (see figures 2 and 3).
WARNING These pilots vent gas or liquids from their exhausts. In hazardous or flammable service, personal injury or property damage may occur due to fire or explosion of vented gas or liquid that has accumulated. To prevent such injury and damage, provide piping or tubing to vent the gas or liquid to a safe location. Protect the vent opening against anything that could block it.
Type 6358, 6365, & 6365C
36A2952-D
TYPE 6358 PILOT
APPLY SEALANT
TYPE 6365C PILOT 39A0582-A
39A0175-A C0542-2
TYPE 6365 PILOT (EXTERIOR VIEW ALSOTYPICAL OF TYPE 6358 PILOT)
Figure 2. Relief Pilot Assemblies
3
Type 6358, 6365, & 6365C Maintenance PORT A (EXHAUST) PORT C (LOADING)
Pilot parts are subject to normal wear and must be inspected and replaced as necessary. The frequency of inspection and replacement depends on the severity of service conditions and the requirements of local, state, and federal rules and regulations.
WARNING PORT D (CONTROL) NOTE: PORT A (EXHAUST) THE MAIN VALVE LOADING PRESSURE IS DISCHARGED TO THE MAIN VALVE OUTLET OR TO ATMOSPHERIC PRESSURE. PORT C (LOADING) A LOADING PRESSURE SIGNAL IS SENT FROM THIS PORT TO THE MAIN VALVE DIAPHRAGM CASING. PORT D (CONTROL) THE MAIN VALVE INLET PRESSURE IS SENSED AT THIS PORT. A3790
Figure 3. Pilot Port Functions
3. A relief pilot always must be installed so that it exhausts properly and into a safe place. When the pilot is shipped mounted on a main valve, a vent is installed in the ¼-inch NPT pilot exhaust connection. Unless it is an umbrella vent with its own built-in protection, this vent must be pointed down or otherwise protected. 4. The pilot exhaust may be piped directly into the main valve outlet (main valve stack with relief service) or piped into a separate low-pressure line. In either case, the diameter of the exhaust line or stack should be as large as practical with a minimum number of bends or other restrictions. 5. The standard Type 6358 or 6365 pilot spring case has a gasketed closing cap and a pressed-in vent (key 16, figure 3) installed in the ¼-inch NPT spring case tapping. The vent may be removed and obstruction-free piping or tubing installed for remote piping or pressure loading of the spring case. If kept in the spring case, the vent must be pointed down or otherwise protected. 6. If using pipe, apply a good grade of pipe compound to the male pipe threads before making the connection. Install tubing or piping into the appropriate pilot connection. 7. Set pressure is defined as the pressure at which the pilot starts to discharge. The set pressure of a unit is adjusted by changing the control spring compression on a Type 6358 or 6365 pilot. The control spring of a Type 6365C pilot cannot be adjusted. 8. Each pilot is factory-set for the set pressure specified on the order. If no setting is specified, set pressure is factory-set at the midrange of the pilot control spring.
Avoid personal injury or damage to property from sudden release of pressure or explosion of accumulated gas or liquid. Before starting disassembly:
• Isolate the pilot and main valve from system pressure, • Release all internal pressure. Perform this procedure if changing the control spring for one of a different range, or if inspecting, cleaning, or replacing any pilot parts. Key numbers refer to figure 3. Note: If sufficient clearance exists, the body (key 1) may remain mounted on the main valve or in a line unless the body is removed or the entire pilot is replaced as a unit. If replacing just the control spring (key 7), spring seat (key 8), or diaphragm limiter (key 40), perform only steps 1, 2, and 6 of the following procedure. 1. Remove the closing cap (key 12) from a Type 6358 or 6365 pilot. Loosen the locknut (key 11), and turn the adjusting screw (key 10) counterclockwise until compression is removed from the spring. 2. Remove the machine screws (Key 17), spring case (Key 2), control spring, and spring seat from the body, making sure that with a Type 6365C pilot these parts do not pop off and get lost. With a type 6365 pilot for set pressures between 175 and 300 psig (12 and 21 bar), also remove the diaphragm limiter (Key 40). 3. Remove the connector cap and gasket (keys 6 and 36) from the top of the diaphragm assembly (Key 5). Then, turn the diaphragm assembly over to remove the valve plug spring (Key 14), valve plug (Key 4) and, if used, the O-ring (Key 37). 4. Make sure the restriction or restriction plug (Key 20), registration hole, and valve plug seating surfaces are free from debris. Inspect and replace parts as necessary. Make sure that the restriction or restriction plug and valve
4
Type 6358, 6365, & 6365C plug are installed, and the secure the valve plug with the stem guide. With a Type 6358 pilot, coat the restriction plug threads with John Crane Plastic Lead Seal(1) sealant or equivalent before installation, and also install the Oring (Key 37) on the valve plug. 5. Install the valve plug and valve plug spring (Keys 4 and 14) into the diaphragm assembly (Key 5). Install the connector cap gasket (Key 36) on the diaphragm assembly connector, and secure with the connector cap (Key 6). 6. Install the diaphragm limiter (if used) with the flat side against the diaphragm, control spring, spring seat, spring case, and machine screws. After assembly, make sure of the proper control spring setting according to the Startup procedure of the appropriate relieve valve manual.
Parts List Key
Description
4 Part Number
Parts Kit (included are keys 4, 5, 13, 14, 19, 36, 37 and P590 Series Filter keys 2 and 7). Type 6358 parts kit R6358X 00012 Type 6365 parts kits Spring range 1/2 to 10 psig (0.034 to 0.69 bar) R6365X 00012 3 to 125 (0.21 to 8.6 bar) R6365X 00022 85 to 300 (5.9 to 21 bar) R6365X 00032 1
2
3
Body Type 6358 Aluminum (std) Brass Stainless steel
39A0138 X012 39A0140 X012 19A5974 X012
Type 6365 or 6365C Aluminum (std or NACE (2) 39A0138 X012 Brass 39A0140 X012 Stainless steel (std or NACE) 19A5974 X012 Spring Case Aluminum std or NACE; also used on Type 6358 w/stainless steel body and plug 25A6220 X012 Brass 25A6219 X012 Stainless steel 28A9277 X012 Body Plug Aluminum (std or NACE) 1B7975 09032 Brass 1B7975 14012 Stainless steel 1B7975 35072
5*
6
7
8
* Recommended spare part. 1. Trademark of John Crane Packing Co. 2. Nations Association of Corrosion Engineers (NACE) standard MR-01-75.
If necessary, mark the new spring range on the spring case and the new restriction letter on the bottom of the body.
Parts Ordering When corresponding with your Fisher sales office or sales representative about this pilot, include the type number and all other pertinent information stamped on the bottom of the body and on the spring case. Also include the main valve serial number. Specify the eleven-character part number when ordering new parts from the following parts list.
Valve Plug and Stem Assembly Type 6365 or 6365C, nitrile seat w/ stainless steel stem 19A0137 X012 Type 6358, polyethylene 16A2924 X012 Diaphragm Assembly (includes steel diaphragm plate, connector, & push nut) Type 6358, Type 6365C or Type 6365 with 3 to 125 psig (0.2 to 8.6 bar) range nitrile diaphragm 15A6216 X072 Type 6365 with 1/2 to 10 psig (0.034 to 0.69 bar) range, natural. rubber diaphragm 15A6216 X182 Type 6365 with 85 to 300 psig (5.9 to 21 bar) range, neoprene diaphragm 15A6216 X192 Connector Cap 18-8 stainless steel 16A2921 X012 18-8 stainless steel for NACE 16A2921 X022 Control Spring, plated steel Type 6358 or 6365 3 to 40 psig (0.21 to 2.8 bar) range, yellow 1E3925 27022 35 to 125 psig (2.4 to 8.6 bar) range, red 1K7485 27202 Type 6365 with ½ to 2 psig (0.034 to 0.14 bar) range or Type 6365 C (nonadjustable), yellow 14A9672 X012 Type 6365 only 2 to 10 psig (0.14 to 0.69 bar) range, black 14A9673 X012 85 to 220 psig (5.9 to 15 bar) range, blue 1L3461 27142 200 to 300 psig (14 to 21 bar) range, green 15A9258 X012 Spring Seat, plated steel Type 6358, Type 6365C or Type 6365 with ½ to 125 psig (0.034 to 8.6 bar) range 1B7985 25062 Type 6365 with 85 to 300 psig (5.9 to 21 bar) range. 1K1558 28982
9
10
10
11
12
13* 13
14
16*
17 19*
Stem Guide stainless steel 16A2923 X012 stainless steel for NACE 16A2923 X022 Adjusting Screw (not for use w/Type 6365C) plated steel. Type 6358 or Type 6365 with ½ to 125 psig (0.34 to 8.6 bar) range 10B3692 X012 Type 6365 with 85 to 300 psig (5.9 to 21 bar) range 10B3691 X012 Set Screw for Type 6365C (not for use w/Type 6358 or 6365, plated steel) 17A7540 X012 Locknut (not for use w/Type 6365C), plated steel 1A9463 24122 Closing Cap (not for use w/Type 6365C) Aluminum (std or NACE) 1H2369 X0012 Brass 1H2369 14012 Stainless steel (std or NACE) 1H2369 X0032 Body Plug Gasket, composition 1C4957 04022 O-Ring Fluoroelastomer 1N4639 06382 Nitrile (std or NACE) 1F1139 06992 Valve Plug Spring Type 6358 Stainless steel 1E7013 37022 Stainless steel for NACE 19A8179 X012 Type 6365 alloy 600 (UNS N07750) 17A2328 X012 Type 6365C 18A3573 X012 Type Y602-12 Vent Assembly, plastic (not for use w/Type 6365C) 27A5516 X012 Machine Screw, carbon steel (6 reqd) 1H4217 28992 Closing Cap Gasket (not for use w/Type 6365C), composition 15A6218 X012
5
Type 6358, 6365, & 6365C
20
Restriction, plated carbon steel (not for use w/Type 6358) No. 57 drill size or 0.043 inch (1.09 mm) diameter (indicated by S stamped on pilot body and red color code—also not for use w/Type 6365C). 17A2029 X012 No. 57 drill size for NACE 17A2029 X022 No. 47 drill size for 0.078 inch (1.99 mm) diameter (indicated by L stamped on pilot body and blue color code— also not for use w/Type 6365C). 17A7277 X012 No. 47 drill size for NACE 17A7277 X022
20
20
36*
37*
Restriction (continued) No. 70 drill size or 0.028 inch (0.71 mm) diameter (indicated by H stamped on pilot body and yellow color code—also not for use w/Type 6365C) 17A7279 X012 No. 70 drill size for NACE 17A7279 X022 Restriction plug for Type 6358 (not for use w/Type 6365 or 6365C) Plated carbon steel 1V7435 28982 Plated carbon steel for NACE 1V7435 X0012 Connector Cap Gasket, fluroelastomer 2 req'd for Type 6365 and 1 req'd for 6365C 1U1716 X0012 O-Ring (for Type 6358 only), nitrile 16A2920 X012
39
Sealing Washer (for Type 6365C only) Cd plated steel and rubber 12A3709 X012
40
Diaphragm Limiter (for Type 6365 w/two highest control spring ranges only) Aluminum 15A9259 X012 Brass 19A8674 X012 Stainless steel 10B4407 X012 John Crane Plastic Lead Seal sealant, 1 pound (0.45 kg) can (for Type 6358 only, not supplied) 1M3307 06992 NACE Tag 18-8 stainless steel 19A6034 X012 (for Type 6365 only) Tag Wire, 303 stainless steel (for Type 6365 only) 1U7581 X0022
41
42
43
* Recommended spare part.
While this information is presented in good faith and believed to be accurate, Fisher Constrols 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, merchantability, fitness
Fisher Controls Printed in USA
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, contact Fisher Controls: Marshalltown, Iowa 50158 USA Cernay 68700 France
Sao Paulo 05424 Brazil Singapore 0512