Emerson Fisher 1805P Series User manual
www.sherregulators.com
Type 1805P
D100675X012
Instruction Manual
Form 5088
October 2009
Type 1805P Pilot-Operated Relief Valve
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion
personal injury or death.
Fisher®
Inc. instructions.
service person to service the unit. Only
Introduction
Scope of the Manual
This manual describes and provides instructions for
the installation, adjustment, maintenance, and parts
ordering information for the Type 1805P pilot-operated
relief valve. Instructions and parts lists for any other
Fisher equipment mentioned in this instruction manual
are found in separate manuals.
Description
The Type 1805P pilot-operated relief valve is used to
provide protection from overpressuring a downstream
system. This relief valve is suitable for service on
natural gas, air, propane, or any other operating
!
WARNING
Figure 1. Type 1805P Pilot-Operated Relief Valve
medium not corrosive to the internal parts. Very little
build-up over the set pressure is required for the main
valve to go wide-open for maximum relief capacity.
Smooth opening action minimizes system pressure
surges during emergency action.
Some of the specications for a given relief valve as
it comes from the factory appear on the nameplate
attached to the Type 1805 main valve spring case.
Other specications appear on the Type 6358B pilot
spring case.
W6913
Type 1805P
2
2 NPT
Maximum Relief (Inlet) Pressure
50 psi (3,4 bar) over relief pressure setting or
150 psig (10,3 bar), whichever is lower
(2)
See Table 1
External
C: 900 (without outlet piping); Cv: 23.7; C1:38
XT: 0.91
FD: 0.44
FL: 0.89
Pilot Control Line and Vent Connections
1/4 NPT
Nitrile (NBR): –20° to 180°F (–29° to 82°C)
0° to 300°F (–18° to 149°C)
13 pounds (6 kg)
1. Relief pressure plus maximum allowable build-up over setting.
2. The pressure/temperature limits in this instruction manual and any applicable standard or code limitation for this relief valve should not be exceeded.
Table 1. Type 6358B Relief Set Pressure Ranges
COLOR
10 to 18 psig
18 to 30 psig
30 to 100 psig
(0,69 to 1,2 bar)
(1,2 to 2,1 bar)
(2,1 to 6,9 bar)
Green
Unpainted
Red
0.120-inch
0.142-inch
0.192-inch
(3,0 mm)
(3,6 mm)
(4,9 mm)
2.12-inch
2.12-inch
2.19-inch
(53 mm)
(53 mm)
(55 mm)
1B986027212
1B788327022
1K748527202
Table 2. Pilot Information
PSIG
(1)
PSIG
PSIG
(3)
PSIG
PSIG
For set pressures
up to 30 (2,1)
1F826927052
Pink
10 to 18
(0,69 to 1,2)
10
15
18
(0,69)
(1,0)
(1,2)
0.8
0.8
0.8
(0,05)
(0,05)
(0,05)
1.1
1.1
1.1
(0,08)
(0,08)
(0,08)
1.0
1.0
1.0
(0,07)
(0,07)
(0,07)
18 to 30
(1,2 to 2,1)
18
25
30
(1,2)
(1,7)
(2,1)
0.9
0.9
0.9
(0,06)
(0,06)
(0,06)
1.3
1.3
1.3
(0,09)
(0,09)
(0,09)
1.0
1.0
1.0
(0,07)
(0,07)
(0,07)
For set pressures
over 30 (2,1)
1D751527022
Unpainted
30 to 100
(2,1 to 6,9)
30
40
50
60
(2,1)
(2,8)
(3,4)
(4,1)
1.5
1.5
1.5
1.5
(0,10)
(0,10)
(0,10)
(0,10)
2.2
2.2
2.2
2.2
(0,15)
(0,15)
(0,15)
(0,15)
1.0
1.0
1.0
1.0
(0,07)
(0,07)
(0,07)
(0,07)
70
80
90
100
(4,8)
(5,5)
(6,2)
(6,9)
1.7
1.7
1.7
2.0
(0,12)
(0,12)
(0,12)
(0,14)
2.5
2.5
2.5
2.5
(0,17)
(0,17)
(0,17)
(0,17)
1.0
1.0
1.0
1.0
(0,07)
(0,07)
(0,07)
(0,07)
1. Set pressure is dened as the pressure at which the pilot exhaust starts to bubble (discharge).
2. Crack pressure is the inlet pressure at which the main valve starts audible ow.
3. Inlet pressure buildup over the set pressure to achieve wide-open capacity.
Type 1805P
3
Installation
result if this relief valve is installed
where service conditions could exceed
equipment may cause equipment
operation within the limits shown in the
any overpressure condition.
!
WARNING
TYPE 1805P RELIEF VALVE
A2787_3
EXPANDED VIEW OF THE TYPE 6358B RELIEF PILOT
DIAPHRAGM ASSEMBLY AND VALVE PLUG
HOLLOW PASSAGE
IN VALVE PLUG STEM
UPPER PORTION
OF VALVE PLUG
LOWER PORTION
OF VALVE PLUG
DIAPHRAGM
ASSEMBLY
FIXED
RESTRICTION
TO MAIN VALVE
DIAPHRAGM
TO
EXHAUST
PORT
INLET PRESSURE
OUTLET (EXHAUST) PRESSURE
ATMOSPHERIC PRESSURE
A2787_3
EXPANDED VIEW OF THE TYPE 6358B RELIEF PILOT
DIAPHRAGM ASSEMBLY AND VALVE PLUG
HOLLOW PASSAGE
IN VALVE PLUG STEM
UPPER PORTION
OF VALVE PLUG
LOWER PORTION
OF VALVE PLUG
DIAPHRAGM
ASSEMBLY
FIXED
RESTRICTION
TO MAIN VALVE
DIAPHRAGM
TO
EXHAUST
PORT
INLET PRESSURE
OUTLET (EXHAUST) PRESSURE
ATMOSPHERIC PRESSURE
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
PILOT
CONTROL
SPRING
ADJUSTING
SCREW
LOCKNUT
TYPE 6358B
A6919_1
TYPE 1805P RELIEF VALVE
A2787_3
EXPANDED VIEW OF THE TYPE 6358B RELIEF PILOT
DIAPHRAGM ASSEMBLY AND VALVE PLUG
HOLLOW PASSAGE
IN VALVE PLUG STEM
UPPER PORTION
OF VALVE PLUG
LOWER PORTION
OF VALVE PLUG
DIAPHRAGM
ASSEMBLY
FIXED
RESTRICTION
TO MAIN VALVE
DIAPHRAGM
TO
EXHAUST
PORT
INLET PRESSURE
OUTLET (EXHAUST) PRESSURE
ATMOSPHERIC PRESSURE
A2787_3
EXPANDED VIEW OF THE TYPE 6358B RELIEF PILOT
DIAPHRAGM ASSEMBLY AND VALVE PLUG
HOLLOW PASSAGE
IN VALVE PLUG STEM
UPPER PORTION
OF VALVE PLUG
LOWER PORTION
OF VALVE PLUG
DIAPHRAGM
ASSEMBLY
FIXED
RESTRICTION
TO MAIN VALVE
DIAPHRAGM
TO
EXHAUST
PORT
INLET PRESSURE
OUTLET (EXHAUST) PRESSURE
ATMOSPHERIC PRESSURE
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
PILOT
CONTROL
SPRING
ADJUSTING
SCREW
LOCKNUT
TYPE 6358B
A6919_1
TYPE 1805P RELIEF VALVE
A2787_3
EXPANDED VIEW OF THE TYPE 6358B RELIEF PILOT
DIAPHRAGM ASSEMBLY AND VALVE PLUG
HOLLOW PASSAGE
IN VALVE PLUG STEM
UPPER PORTION
OF VALVE PLUG
LOWER PORTION
OF VALVE PLUG
DIAPHRAGM
ASSEMBLY
FIXED
RESTRICTION
TO MAIN VALVE
DIAPHRAGM
TO
EXHAUST
PORT
INLET PRESSURE
OUTLET (EXHAUST) PRESSURE
ATMOSPHERIC PRESSURE
A2787_3
EXPANDED VIEW OF THE TYPE 6358B RELIEF PILOT
DIAPHRAGM ASSEMBLY AND VALVE PLUG
HOLLOW PASSAGE
IN VALVE PLUG STEM
UPPER PORTION
OF VALVE PLUG
LOWER PORTION
OF VALVE PLUG
DIAPHRAGM
ASSEMBLY
FIXED
RESTRICTION
TO MAIN VALVE
DIAPHRAGM
TO
EXHAUST
PORT
INLET PRESSURE
OUTLET (EXHAUST) PRESSURE
ATMOSPHERIC PRESSURE
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
PILOT
CONTROL
SPRING
ADJUSTING
SCREW
LOCKNUT
TYPE 6358B
A6919_1
Figure 2. Typical 1805P-6358B Relief Valve Installation Operational Schematic
Principle of Operation
Inlet pressure registers on the underside of the main
valve diaphragm and also on the underside of the pilot
diaphragm. As long as the inlet pressure is below the
set pressure, the pilot control spring keeps the pilot
valve plug closed. Inlet pressure passes through the
pilot restriction and registers as loading pressure on
top of the main valve diaphragm, keeping it closed.
When inlet pressure rises above the set pressure, the
pressure on the pilot diaphragm overcomes the pilot
control spring and opens the pilot valve plug. The
pilot exhausts the loading pressure from the top of
the main valve diaphragm and plug assembly. While
inlet pressure is above the set pressure, the pilot
continuously exhausts gas. Inlet pressure unbalance
overcomes the main spring force and opens the main
valve, reducing the inlet pressure to set pressure.
As the inlet pressure drops below the set pressure, the
pilot control spring closes the pilot valve plug and the
exhaust stops. This causes the inlet pressure to build
in the main valve diaphragm casing, allowing the main
valve spring to close the main valve.
A
D
C
Type 1805P
4
150 psi (10,3 bar). The individual spring range of your
relief valve is stamped on the nameplate. System
operation within these limitations does not eliminate the
possibility of damage from external sources or debris in
the gas line. The valve should be inspected for damage
after any overpressure condition.
Vents
an explosion hazard under enclosed
installations. Install remote vent lines to
If remote venting is necessary, install remote vent
lines in both the outlet of the pilot and the outlet of
the main valve. Remove the screen, if one is present
in the outlet, and install remote vent lines in the
outlet openings. The vent lines must have the largest
practical diameter and be as short as possible with a
minimum number of bends or elbows.
Startup
With proper installation completed and system
equipment properly adjusted, close any vent valves,
and slowly open the upstream shutoff valve while using
pressure gauges to monitor pressure.
Adjustment
Note
Each unit is factory set for the pressure specied on
your order. The allowable spring range is stamped
on the nameplate. If a pressure setting beyond the
indicated range is required, substitute the appropriate
spring. Be sure to label the valve to indicate the new
pressure range.
Pilot Adjustment
If set pressure adjustment is necessary, monitor
the inlet pressure with a gauge during the
adjustment procedure.
If it is necessary to vent the unit, install an exhaust
line into the 1/4 NPT pilot exhaust (port A, Figure 2).
This exhaust line may be vented directly into the main
valve outlet or separately to atmosphere. In either
case, the vent line or stack diameter should be as
large as practical with a minimum number of bends or
other restrictions.
A vent line or stack must be located to avoid venting
gas near buildings, air intakes, or any hazardous
location. The line or stack opening must be protected
against debris, weather, condensation, insects, or
anything else that might clog it.
The set pressure of the unit is adjusted by changing the
pilot spring compression. The pressure setting of each
unit is factory set. If adjustment is necessary, refer to
the Adjustment section for the procedures.
Overpressure Protection
Relief ranges are from 10 to 150 psig (0,69 to 10,3 bar).
The maximum inlet pressure including build-up, is
Before installing, inspect the main valve and pilot for
any shipment damage and any foreign material. Make
sure that the valve is oriented so that pipeline ow is
in the same direction as indicated by the arrow cast on
the body. Use a good grade of pipe compound on the
pipe threads, but not on the body threads.
A typical pilot mounting position is shown in Figure 1.
To achieve other desired control and exhaust
connections, the pilot may be rotated on the pipe nipple
(port C, Figure 2).
The Type 1805P requires a control line attached to the
1/4 NPT control connection (port D, Figure 2). The
control line should be 1/4-inch (6,4 mm) outer diameter
pipe or tubing or larger and connected to a straight
run of inlet piping. If the pipeline contains dirt, install a
lter in the control line and/or upstream piping.
an explosion hazard under enclosed
is remotely vented to a safe location.
than the upper limit of the set pressure
!
WARNING
!
WARNING
Type 1805P
5
1. Loosen the locknut (key 11, Figure 4).
2. Turn the adjusting screw (key 10) clockwise to
increase or counterclockwise to decrease the relief
pressure setting.
3. Tighten locknut (key 15)
Shutdown
Slowly close the upstream shutoff valve and release
all pressure from the main valve and pilot by opening a
vent valve.
Maintenance
Relief valve parts are subject to normal wear and must
be inspected and maintained as necessary, depending
upon the service conditions.
to property from sudden release
Type 1805P Main Valve
This procedure is to be performed if main valve parts
would require inspecting, cleaning, or replacing. Key
numbers are referenced in Figure 3.
Note
1. Disconnect pilot (ports A and D, Figure 2). The
pilot may remain attached to the main valve
closing cap (key 17) unless replacing the cap.
2. Remove the closing cap (key 17) from the spring
case (key 13), loosen the locknut (key 15),
and turn the set screw (key 14) to remove
spring compression.
!
WARNING
3. Unscrew the union nut (key 16) and remove it with
the spring case (key 13), spring (key 11), and
spring seat (key 12).
4. Pull the O-ring holder (key 4) out of the valve guide
orice (key 2).
5. Remove the diaphragm cap screw (key 10)
and the diaphragm plate (key 9). Then inspect
the diaphragm (key 8).
6. Take the machine screw (key 7) out of the opposite
end of the O-ring holder, remove the O-ring
washer (key 6) and inspect the O-ring (key 5).
7. Remove the valve guide orice (key 2) from the
body and check the O-ring (key 3).
8. Replace parts as necessary and reassemble the
main valve in reverse order of steps 2 through
7. To ensure proper slack in the diaphragm,
tighten the union nut nger-tight only. To provide
the proper amount of main valve spring loading,
turn both the locknut and set screw all the way
in until the locknut bottoms against the spring case
and the set screw head bottoms against the
locknut. Complete the tightening of the union nut
and connect the pilot lines.
Type 6358B Pilot
Key numbers are referenced in Figure 4. Unless
replacing or removing the pilot body (key 1), the pilot may
remain on the main valve during maintenance.
Disassembly
1. Remove the closing cap (key 12), loosen the
locknut (key 11), and back out the adjusting screw
(key 10) until compression is removed from the
control spring (key 7).
2. Remove the machine screws (key 17) and
separate the spring case (key 2) from the pilot
body. Remove the control spring seat (key 8)
and the control spring (key 7).
3. Lift out the diaphragm assembly (key 5) and
valve plug (key 4). Check the stem guide (key 9)
and restriction (key 20) for damage or plugging.
4. If necessary to replace the diaphragm assembly
(key 5), the valve plug (key 4), the valve spring
(key 14), or the stem O-ring (key 37), remove the
connector cap (key 6) and O-ring or gasket (key 36)
from the top of the diaphragm assembly.
Type 1805P
6
Assembly
1. If removed, install the body plug O-ring (key 13)
over the body plug (key 3), and install the body plug
into the body (key 1).
2. Install the stem guide (key 9), if removed, and
make sure to install the O-ring or gasket (key 36)
between the body (key 1) and the stem guide.
Note
new letter.
3. If the restriction (key 20) was removed, coat the
threads with lubricant and install it.
4. If replacing the stem O-ring (key 37), sparingly
apply lubricant and install the O-ring over the valve
plug (key 4).
5. If removed, install the valve plug (key 4) and valve
spring (key 14) into the diaphragm assembly
(key 5). Install a replacement O-ring or gasket
(key 36) on the diaphragm assembly, and secure
with the connector cap (key 6).
6. Install the diaphragm assembly (key 5) and push
down on it to see if the valve plug (key 4) moves
smoothly. The diaphragm assembly should stroke
approximately 1/16-inch (1,6 mm) after the valve
plug contacts the port.
Note
7. Place the control spring (key 7) and the control
spring seat (key 8) on the diaphragm assembly
(key 5).
8. Install the spring case (key 2) on the body (key 1)
with the vent assembly (key 16) oriented to
prevent clogging or entrance of moisture.
Install the machine screws (key 17) and tighten in
a crisscross pattern, using 5 to 7 foot-pounds
(6,8 to 9,5 N•m) of torque.
9. Replace the closing cap gasket (key 19) if
necessary, and install the closing cap (key 12).
When corresponding with your local Sales Ofce about
this equipment, always reference the equipment serial
number or FS number that can be found on
the nameplate.
When ordering replacement parts, reference the key
number of each needed part as found in the following
parts list.
Parts List
1 Valve Body, Cast iron 1E824319012
2 Valve Guide Orice, Anodized aluminum 1N939909012
3* O-ring, Nitrile (NBR) 1N940306562
4 O-ring Holder, Aluminum 1E824609092
5* O-ring, Nitrile (NBR) 1C5622X0022
6 O-ring Washer, Stainless steel 1E824235072
7 Machine Screw, Steel 1B420428982
8* Diaphragm, Nitrile (NBR) 1E824102052
9 Diaphragm Plate, Brass 1E824714012
10 Cap Screw, Zinc-plated steel 1E760324052
11 Spring, Zinc-plated steel
10 to 30 psig (0,69 to 2,1 bar), Pink 1F826927052
30 to 100 psig (2,1 to 6,9 bar), Unpainted 1D751527022
12 Spring Seat, Steel 1D667125072
13 Spring Case, Cast iron 2E824919042
14 Set Screw, Zinc-plated steel 1D995448702
15 Locknut, Zinc-plated steel 1H483324122
16 Union Nut, Ductile iron 1E766619062
17 Closing Cap, Brass 1E823914012
18 Nameplate, Aluminum - - - - - - - - - - -
19 Drive Screw, Steel (4 required) 1E501728982
*Recommended spare part
Type 1805P
7
Figure 3. Type 1805P Main Valve Assembly
BE9481-C
B1128
1 6 7
3
5
4
2
8
16
9
10
11
19
18
12
13
15
14
17
ANTI-SEIZE
1 Pilot Body, Aluminum 39A0138X012
2 Spring Case, Aluminum 25A6220X012
3 Body Plug, Aluminum 1B797509032
4* Valve Plug and Stem Assembly
Nitrile (NBR) plug with stainless steel stem 14B6372X012
Fluorocarbon (FKM) plug with stainless
steel stem 16A2924X012
5* Diaphragm Assembly
Nitrile (NBR) 15A6216X072
Fluorocarbon (FKM) 15A6216X172
6 Connector Cap, Stainless steel 16A2921X012
7 Spring
10 to 18 psig (0,69 to 1,24 bar), Green 1B986027212
18 to 30 psig (1,24 to 2,07 bar), Unpainted 1B788327022
30 to 100 psig (2,07 to 6,90 bar), Red 1K748527202
8 Spring Seat, Zinc-plated steel 1B798525062
9 Stem Guide, Stainless steel 16A2923X012
10 Adjusting Screw 10B7192X012
11 Locknut 1A946324122
12 Closing Cap 23B9152X012
13* Body Plug Gasket or O-ring
Nitrile (NBR) 1C495704022
Fluorocarbon (FKM) 1N463906382
14 Valve Spring 17A2328X012
16 Vent Assembly, Type Y602X1-A12 (2 required) 27A5515X012
17 Machine Screw (6 required) 10B6189X022
19* Closing Cap Gasket 15A6218X012
20*Restriction
High gain 17A7279X012
Medium gain 17A2029X012
Low gain 17A7277X012
36* Stem Guide Gasket,
Fluorocarbon (FKM) (2 required) 1U1716X0012
37* Stem O-ring
Nitrile (NBR) 16A2920X012
Fluorocarbon (FKM) 16A2920X022
*Recommended spare part
Type 1805P
The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls, Inc., a
business of Emerson Process Management.
The contents of this publication are presented for informational purposes only, and while every eort has been made to ensure their accuracy, they are not to be construed as warranties or
guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specications of such
products at any time without notice.
Emerson Process Management does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson
Process Management product remains solely with the purchaser.
©Emerson Process Management Regulator Technologies, Inc., 1977, 2009; All Rights Reserved
Industrial Regulators
Emerson Process Management
Regulator Technologies, Inc.
USA - Headquarters
McKinney, Texas 75069-1872 USA
Tel: 1-800-558-5853
Outside U.S. 1-972-548-3574
Asia-Pacic
Shanghai, China 201206
Tel: +86 21 2892 9000
Europe
Bologna, Italy 40013
Tel: +39 051 4190611
Middle East and Africa
Dubai, United Arab Emirates
Tel: +971 4811 8100
Natural Gas Technologies
Emerson Process Management
Regulator Technologies, Inc.
USA - Headquarters
McKinney, Texas 75069-1872 USA
Tel: 1-800-558-5853
Outside U.S. 1-972-548-3574
Asia-Pacic
Singapore, Singapore 128461
Tel: +65 6777 8211
Europe
Bologna, Italy 40013
Tel: +39 051 4190611
Gallardon, France 28320
Tel: +33 (0)2 37 33 47 00
TESCOM
Emerson Process Management
Tescom Corporation
USA - Headquarters
Elk River, Minnesota 55330-2445 USA
Tel: 1-763-241-3238
Europe
Selmsdorf, Germany 23923
Tel: +49 (0) 38823 31 0
For further information visit www.sherregulators.com
Figure 4. Type 6358B Pilot Assemblies
48B1532
3
16
37
41
17
9
5
6
8
19
10
14
12
11
2
7
36
16
20
4
1
13
41
This manual suits for next models
1
Table of contents
Other Emerson Control Unit manuals
Emerson
Emerson SolaHD SCM-E-EIP User manual
Emerson
Emerson BM6X Series User manual
Emerson
Emerson Anderson Greenwood 95 Series User manual
Emerson
Emerson ENARDO 860 Series User manual
Emerson
Emerson Fisher Baumann 24003 User manual
Emerson
Emerson 850 User manual
Emerson
Emerson BM6X Series User manual
Emerson
Emerson Enardo ES-665-HF User manual
Emerson
Emerson Spence K3 User manual
Emerson
Emerson Yarway 7100 Series User manual
Emerson
Emerson KTM E0105 Series Manual
Emerson
Emerson Keystone EPI2 User manual
Emerson
Emerson PACSystems VersaMax IC200BEM002 User manual
Emerson
Emerson Fisher ME00124272 Configuration guide
Emerson
Emerson TX7 User manual
Emerson
Emerson Fisher 8532 User manual
Emerson
Emerson Fisher MR98LD User manual
Emerson
Emerson Topworx D Series Instruction manual
Emerson
Emerson Rosemount BP20E User manual
Emerson
Emerson Rosemount Analytical NGA2000 CLD User manual
Popular Control Unit manuals by other brands
Irritrol
Irritrol RD-600 Installation and programming guide
KJB Security
KJB Security DIY110 quick start guide
ICP DAS USA
ICP DAS USA MN-3253 Series user manual
Phoenix Contact
Phoenix Contact Axioline F user manual
impro
impro ImproX XTA905-1-0-GB Series installation manual
Draper
Draper LVC-IV Wiring instructions