Emerson Fisher Snappy Joe N550 User manual

Type N550 Snappy Joe®Emergency
Shuto󰀨 Valves
Failure to follow these instructions or to
properly install and maintain this
equipment could result in an explosion
and/or re causing property damage and
personal injury or death.
Fisher® equipment must be installed,
operated, and maintained in
accordance with federal, state, and
local codes and Emerson Process
Management Regulator Technologies,
Inc., instructions. The installation in
most states must also comply with
NFPA No. 58 or ANSI K61.1 standards.
Only personnel trained in the proper
procedures, codes, standards, and
regulations of the LP-Gas or anhydrous
ammonia industries should install and
service this equipment.
Introduction
Scope of the Manual
This manual provides installation and maintenance
instruction for the Type N550 Emergency Shuto󰀨
Valves and Accessories.
Description
Type N550 Snappy Joe® (Figure 1) emergency shuto󰀨
valves are intended for in-line use on LP-Gas or
Anhydrous Ammonia (NH3) service.
The valves may be installed on both ends of transfer
hoses where the hose connects the bulk plant piping
to the bobtail, transport, or tank car. They provide
a quick way of shutting o󰀨 gas ow in the event of
a hose rupture and meet the requirements for such
service when correctly installed with a remote release
and proper piping support. The Type N550 valves are
lever operated, latch-open, and quick closing valves.
A fusible element in the latch melts if the temperature
reaches 212°F (100°C), allowing the valve to close.
The following accessories are also covered:
Type P164B – Cable Release Assembly.
Type P327D – Remote Pneumatic Release Assembly.
Specications
The Specifications table lists specifications for the
Type N550 valve which is designed for butane,
propane, or NH3 service at ambient temperatures.
Contact your local distributor if the valve is to be
used on any other service, fluid, compressed gas,
or temperature condition.
Figure 1. Type N550 in Closed Position
!
WARNING
Instruction Manual
D450040T012
March 2010
Type N550

Specications
Maximum Inlet Pressure: 400 psig (27,6 bar)(1)
Operation
CAUTION
The Type N550 handle and shaft may
break if the valve is forced open against
the gas ow and before pressure is
equalized on each side of the main
valve disk.
To Open a Closed Valve:
Close a shuto󰀨 valve downstream of the Type N550.
Pull the Type N550 handle counterclockwise. There
will be an opening as inlet pressure helps hold the
valve disk closed against the seat. The initial opening
force on the handle opens a pilot valve in the main
valve disk, permitting pressure to build-up downstream.
When di󰀨erential pressure across the main disk has
been reduced, the Type N550 can be opened without
further di󰀩culty by continuing to lift the handle to the
open position. When the handle is fully open (handle
perpendicular to the pipe) the latch engages to hold
the valve open.
CAUTION
Because the valve is spring closed
(aided by pressure), the handle can snap
down with considerable force when
closing. Keep hands and ngers away
from the handle as it closes.
To Close an Open Valve:
Pushing the handle down (handle parallel to the pipe)
will close the valve.
From a remote location, pulling on the remote cable or
exhausting pneumatic pressure from the Type P327D
will retract the plunger allowing the Type N550 to close.
If emergency conditions cause the fusible element to
reach a temperature of 212°F (100°C), the element,
which attaches the handle to the shaft, pulls apart and
allows the valve to close.
Installation
Shuto󰀨 Direction
The valves shall be installed in the xed piping
between a storage tank and the transfer hose
connection at the truck or tank car loading/unloading
area. They can be placed in a line used either for
lling or withdrawing from the storage tank (or both).
The valve shall be installed to shuto󰀨 ow from the
tank towards the hose, enabling the valve to control
product loss in case of a hose break.
!
WARNING
The Type N550 valves are spring closed
(aided by pressure) and shuto󰀨 ow in
one direction only. THE NAMEPLATE
FLOW ARROW SHOWS FLOW
DIRECTION FOR VALVE SHUTOFF
(see Figure 6). The arrow shall point
to the hose connection. Improper ow
direction will not shuto󰀨 ow through
the line.
When installed in horizontal piping, install with the
nameplate up. The valve can be installed in vertical
piping with the ow arrow pointing to the desired ow
direction for valve shuto󰀨. In some cases the normal
ow through the valve may be opposite the shuto󰀨
direction (like a back check valve).
Bulkhead Protection
The valve should be installed near the hose
connection, but shall be positioned so that any undue
strain resulting from a hose pull cannot shear the valve
or its inlet piping from the storage area piping. The
piping shall always be rmly supported and anchored
to be sure of meeting the requirement.
One preferred method of installation is shown in
Figure 2 where the pipe connection to the valve and
to the hose coupling is securely anchored in a
solid bulkhead.
TYPE BODY SIZES, NPS* PROPANE FLOW AT 2 PSI (0,14 bar)
DIFFERENTIAL, GPM (l/min)
N550-10 1-1/4 FNPT 75 (284)
N550-16 2 FNPT 115 (435)
N550-24 3 FNPT 275 (1041)
Temperature Capabilities: -40° to 212°F (-40° to 100°C)
1. The pressure limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
*Nominal Pipe Size
2
Type N550

remote location. Cable shall operate
smoothly, over pulleys and/or through
conduit. Do not kink cable or run cable
around sharp corners. If installed in
conduit, keep water out of conduit.
Frozen water, dirt or dried mud in the
conduit will render the remote
release inoperable.
Remote releases used on Type N550
valves shall not:
(a) be made from plastic or ber rope;
(b) have any kind of fusible link which
could melt and prevent the cable
from pulling the Type N550 latch.
To provide a remote release, aircraft cable can be
connected to the short looped cable on the valve and
run to the remote release point over pulleys or through
conduit. Adjust the cable so that minimal pull is
required to close the emergency valves.
Type P164B Cable Installation
To connect a Type P164B remote release assembly, which
is supplied with 50 feet (15 m) of cable:
1. Run the inner cable and housing assembly to the
remote release point. Leave enough slack on
each end for a smooth, owing path, without sharp
bends in the cable, between the Type N550 latch
block and remote release handle.
A bobtail truck can provide enough pull on the hose
connection to cause a break in the system. That
break must not occur between the Type N550 and the
storage tank.
Fusible Element Location
A fusible element that will close the Type N550 shall be
located within ve feet of the hose connection. If the
Type N550 is placed within ve feet of the hose
connection, this requirement is met. If not, an additional
fusible element must be provided near the hose coupling
which will activate a remote release.
Remote Release Installation
In all installations a remote release shall be connected
to the latch on all emergency valves at the bulkhead.
The remote release has to extend to a place where it
can be easily reached to close the Type N550 valve(s)
in the event that an emergency makes the valve(s)
inaccessible. The remote release shall shutdown all
emergency valves when activated. Remote release
activation may be by cable or pneumatic hook-up.
Cable Hook-Ups
!
WARNING
Remote release cables shall be installed
so that they will close the Type N550
valve(s) when pulled from the farthest
Figure 2. Typical Installation of Type N550 Using Remote Cable Release
T20874
INCHES
(mm)
HOSE CONNECTION
BULKHEAD
12 (305)
OR MORE NAMEPLATE UP
EMERGENCY SHUTOFF
VALVE TYPE N550
REMOTE CABLE TO
SAFE LOCATION
FIXED PIPING
3
Type N550

2. If it is necessary to cut the cable to a shorter
length, pull about one foot of inner cable from the
Type N550 latch block cable end (end with the 3/16
by 1/2-inches (4,8 by 13 mm) long cylindrical cast
tting, see Figure 3) from the housing.
At the remote release end (other end of inner
cablehousing assembly), cut the housing and
inner cable at desired length. Push the excess
inner cable back through the housing so that the
bare cable extends from the remote release end.
3. Close the Type N550 valve. Handle parallel to pipe.
4. If necessary for additional working space, remove
the long end of the external spring from under the
latch block. DO NOT REMOVE SPRING
FROM HANDLE.
5. Loosen the slotted screw, Figure 3, on the
Type N550 valve’s latch block until the plunger
can be pulled from the latch block.
6. Disconnect the short looped cable and remove it.
7. Insert the Type P164B inner cable end cylindrical
cast tting through the latch block rear conical
hole and connect the cylindrical cast tting into the
side slot in the plunger.
8. Replace the plunger in the latch block, oriented
so the screw will enter the plunger slot. Tighten
the screw.
9. The end of the cable housing and cable housing
nut t into the conical end of the latch block.
Pulling the excess inner cable through the housing
from the remote release end will hold the housing
in the latch block.
10. Mount the remote release cylinder assembly to a
suitable support at the remote release location
[7/16-inch (11 mm) diameter mounting hole] but
do not tighten the mounting nut.
11. At the remote release end, strip about 3/4-inch
(19 mm) of vinyl cover from the cable housing end.
12. Insert the inner cable completely through the
release cylinder. Screw the bare cable housing
end into the remote release cylinder by rotating
the cylinder. Tighten the mounting nut.
13. Pull any slack from the inner cable, just tight
enough so that the latch is not activated, and
cut the inner cable o󰀨 1-inch
(25 mm) past the
remote release cylinder end.
14. Insert the 1-inch (25 mm) bare inner cable
into the remote release handle shaft. Push the
remote release handle completely into the
remote release cylinder. Tighten the handle set
screw to secure the handle to the inner cable.
Figure 3. Type P164B Cable Release Installation Schematic
REMOTE RELEASE END
HANDLE
SET
SCREW
REMOTE RELEASE CYLINDER
MOUNTING NUT
3/16 x 1/2 (4,8 x 13)
CYLINDRICAL
CAST FITTING
CABLE
HOUSING NUT
TYPE N550
LATCH
BLOCK END
CLAMP
CLAMP
PLUNGER
SLOTTED PLUNGER SCREW
1
(25)
INCHES
(mm)
4
Type N550

5
CAUTION
Possible hand and nger pinch point
between closing Type N550 handle and
latch block. Handle closes quickly and
with extreme force. Keep hands and
ngers away from handle as it closes.
15. Test the remote release and Type N550 operation
from the most remote location. Rotate handle
counterclockwise to open valve. Valve must stay
open. HANDLE AND VALVE MUST QUICKLY
“SNAP” CLOSED when (a) the remote release
cable is pulled, and (b) handle is pushed closed
from the open position.
!
WARNING
All open Type N550 emergency valve(s)
attached to the remote release must
properly close when the release cable
is pulled.
Pneumatic Hook-Up
Type P327D Pneumatic Release
Block Installation
If several valves are installed at the same location, remote
release may be accomplished with the Type P327D
pneumatic release block which replaces the cable latch
block installed on the Type N550 valves.
To install the Type P327D, see Figure 4:
1. Close the Type N550 valve. Handle is parallel to
the pipe.
2. Remove the long end of the external spring from
under the latch block. DO NOT REMOVE
SPRING FROM HANDLE.
3. Remove latch bolt(s). Older valves will have 2
bolts. DISCARD CABLE LATCH BLOCK.
4. Use a 5/32-inch (4 mm) Allen head wrench to
screw 1/4-inch (6,4 mm) long bolt into bottom hole.
5. Tighten until bolt head seats rmly on body.
6. Place latch block on body with lower blind hole
over bolt in body.
7. Install 3/4-inch (19 mm) long bolt through
second hole and rmly tighten with 5/32-inch
(4 mm) Allen head wrench.
8. Refasten long end of spring under latch block by
ROTATING 180 DEGREES CLOCKWISE.
9. Attach the remote air source to the cylinder end
with appropriate supply tubing and valving. A
regulated air supply of 30 to 70 PSIG (2,1 to
4,8 bar) to the Type P327D pneumatic release
cylinder is required for proper operation.
Figure 4. Type P327D Pneumatic Cylinder Installation
TO HOSE
NAMEPLATE
TO TANK
5/32 (4) ALLEN HEAD
WRENCH REQUIRED
AIR SOURCE – 1/8 NPT
5/32 (4) ALLEN HEAD
WRENCH REQUIRED
T40337
INCHES
(mm)
5
Type N550

Optional Motion Release Cable
With either the cable or pneumatic remote release
hook-ups, it is possible to connect an additional cable
from the Type N550’s operating handle to the truck
along the transfer hose(s). This cable would close
the valve if the hose(s) is stretched (driver does not
disconnect) beyond a preselected limit. The hook-up
does not a󰀨ect the normal operation of the valve.
Motion Release Cable Installation
1. Connect a suitable release cable such as stainless
steel aircraft cable to a standard “S” hook.
Attach the “S” hook to the Type N550 handle as
shown in Figure 5.
2. The cable should run through the bulkhead just
below and to the side of the pipe. The cable
should be in line with the operating lever, refer
to Figure 5.
3. Leave enough slack in the cable to allow the
Type N550 lever to move freely but not close
during normal hose movement or hook-up.
4. Run the cable along the hose. Tape or secure it to
the hose. Fasten the cable securely to the “truck”
end hose connection.
When the hose stretches more than the amount of
slack left in the cable, the tightening cable will pull the
lever down and close the Type N550 valve.
CAUTION
Possible hand and nger pinch point
between closing Type N550 handle and
latch block. Handle closes quickly and
with extreme force. Keep hands and
ngers away from handle as it closes.
10. Test the remote release and Type N550
operation. Rotate handle counter clockwise
to open valve. Valve must stay open. HANDLE
AND VALVE MUST QUICKLY “SNAP”
CLOSED when (a) air pressure is exhausted
from Type P327D pneumatic remote release,
and (b) the handle is pushed closed from the
open position.
!
WARNING
All open Type N550 Emergency Valve(s)
attached to the remote pneumatic
release system must properly close
when air pressure is exhausted from the
system. Remote release controls must
quickly exhaust pressure from the
supply line to close emergency valves.
Figure 5. Motion Release Cable Installation (Optional)
TO TRUCK
BULKHEAD
HOSE CONNECTION
12 (305)
OR MORE FIXED PIPING
NAMEPLATE UP
EMERGENCY SHUTOFF
VALVE TYPE N550
REMOTE ACTIVATION METHOD,
CABLE OR PNEUMATIC,
ATTACHMENT LOCATION
1 (25)
“S” HOOK
CABLE
T20995
INCHES
(mm)
6
Type N550

Maintenance
!
WARNING
Only qualied service personnel should
attempt to repair these valves. Before
starting any type of repair, close o󰀨 the
upstream valves and remove all pressure
from both the inlet and outlet of the
Type N550 Emergency Shuto󰀨 Valve.
At least once a month, inspect and check the
following things:
1. See that the remote release is properly
connected, works freely, and is not worn.
Operate the release to make certain it closes
the valve. If the valve closes slowly, packing
replacement (refer to form MCK-1155,
D450042T012) may be required.
2. Make sure that the lever, latch, and release are
working smoothly. The latch parts and lever are
easily accessible for replacement or repair by
removing the securing bolts.
3. Check for packing and joint leakage.
Replacing Internal Parts
Type N550 can be repaired in the eld. However,
due to the special re resistant seals and assembly
techniques, repairs should be done only by trained
personnel. If repair should become necessary,
contact your local LP-Gas Equipment Distributor for
information and assistance.
Only parts manufactured by Emerson Process
Management Regulator Technologies Inc., should be
used for the repair of Fisher Type N550 Valves. Be sure
to give the complete type number of the Type N550
when corresponding with your local distributor.
Type N550 valves that have been disassembled for
repair must be tested for proper operation before being
returned to service.
Figure 6. Type N550 Shuto Valve Assemblies
9
34
35
63
39
36A
37
38
21
20
19
33
32 61
23
62
22
24
15
18
31
30
2928
27
26
25
16
NAMEPLATE WITH ARROW INDICATING
FLOW DIRECTION
VIEW A-A
41
43
45
WITH ITEM 46 (NUT)
NOT SHOWN
TYPE N550-10 ONLY
40
41
8
17
42
47
58
3
75 FOOT-POUND
(102 N•m)
1
5
4
7
6
2
A
A
10 TO 15 FOOT-POUNDS
(14 TO 20 N•m)
APPLY LUB/SEAL/ADH
INCHES
(mm)
T40335
7
Type N550

Parts List
Key Description Part Number
Packing Assembly Kit T13090T0012
Includes packing stack (key 30), gasket (key 26)
and two washers (key 29).
1 Body, Ductile iron
Type N550-10 (NPS 1-1/4 FNPT) T40333X0012
Type N550-16 (NPS 2 FNPT) T40245T0012
Type N550-24 (NPS 3 FNPT) T80171T0012
2 Flange, Ductile iron
Type N550-10 (NPS 1-1/4 FNPT) T20681T0012
Type N550-16 (NPS 2 FNPT) T12783T0012
Type N550-24 (NPS 3 FNPT) T20699T0012
3 Cap Screw
Type N550-10 (NPS 1-1/4 FNPT) (4 Required) T12864T0012
Type N550-16 (NPS 2 FNPT) (4 Required) 1E760432992
Type N550-24 (NPS 3 FNPT) (8 Required) 1E760432992
4* Seat Ring, Stainless steel
Type N550-10 (NPS 1-1/4 FNPT) T12857T0012
Type N550-16 (NPS 2 FNPT) T12548T0012
Type N550-24 (NPS 3 FNPT) T12887T0012
5* Sealing Ring, Nitrile (NBR)
Type N550-10 (NPS 1-1/4 FNPT) T12858T0012
Type N550-16 (NPS 2 FNPT) T12547T0012
Type N550-24 (NPS 3 FNPT) T12891T0012
6* O-ring, Nitrile (NBR)
Type N550-10 (NPS 1-1/4 FNPT) 10A3800X032
Type N550-16 (NPS 2 FNPT) 1H8762X0022
Type N550-24 (NPS 3 FNPT) T12759T0012
7* Gasket, Graphite
Type N550-10 (NPS 1-1/4 FNPT) T12863T0012
Type N550-16 (NPS 2 FNPT) T12839T0012
Type N550-24 (NPS 3 FNPT) T12890T0012
8 Poppet Sub-Assembly
Type N550-10 (NPS 1-1/4 FNPT) T12964T0012
Type N550-16 (NPS 2 FNPT) T12965T0012
Type N550-24 (NPS 3 FNPT) T12966T0012
9 Pipe Plug T13718T0012
15 Shaft, Stainless steel
Type N550-10 (NPS 1-1/4 FNPT) T20680T0012
Type N550-16 (NPS 2 FNPT) T20675T0012
Type N550-24 (NPS 3 FNPT) T20698T0012
Key Description Part Number
16 Sleeve, Nylon (PA)
Type N550-10 (NPS 1-1/4 FNPT) T12842T0012
Type N550-16 (NPS 2 FNPT) T12842T0012
Type N550-24 (NPS 3 FNPT) T12893T0012
17 Nameplate - - - - - - - - - - -
18 Handle, Aluminum T20677T0012
19 Shoulder bolt, Alloy steel-plate T12853T0012
20 Nut, Carbon steel T1166228982
21 Roller, Nylon (PA) T12847T0012
22 Fuse link, Brass T13500T0012
23 Bolt, Zinc-plated steel 1B290524052
24 Retainer, Zinc-plated steel T12843T0012
25 Spring, 302 Stainless steel
Type N550-10 (NPS 1-1/4 FNPT) T12844T0012
Type N550-16 (NPS 2 FNPT) T12844T0012
Type N550-24 (NPT 3 FNPT) T13005T0012
26* Gasket, Composition T12865T0012
27 Gland, 303/416 Stainless steel
Type N550-10 (NPS 1-1/4 FNPT) T12850T0012
Type N550-16 (NPS 2 FNPT) T12850T0012
Type N550-24 (NPS 3 FNPT) T13006T0012
28 Spring, 302 Stainless steel T12851T0012
29 Washer, Carbon steel (2 Required) T1207524082
30 Packing Stack T12854T0012
31 Follower, 174 Stainless steel T12841T0012
32 Retainer, Steel T20674T0012
33 Bolt, Stainless steel (2 Required) T12499T0012
34 Bushing T12551T0012
35 Washer, Nylon (PA) T12781T0012
36 Latch Block, Aluminum T13800T0012
37 Spring, 302 Stainless steel T13877T0012
38 Plunger, Polyester T12846T0012
39 Cable T12849T0012
40 Screw, Carbon steel 1E175828982
41 Bolt T12980T0012
42 Drive Screw, 18-8 Stainless steel (2 Required) 1A368228982
43(1) Adaptor Plate, Zinc-plated steel T12878T0012
45(1) Cap Screw 1D617032992
46(1) Nut (Not Shown) T1022724122
47 Handgrip T12928T0012
61 Spring, Mandrel T13826T0012
62 Spring, Torsion T20973T0012
63 Bolt, Alloy steel T13803T0012
*Recommended spare part.
1. Applicable for Type N550-10 (NPS 1-1/4 FNPT) Only.
Type N550
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D450040T012 © 2001, 2019 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 11/19.
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The contents of this publication are presented for informational purposes
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are not to be construed as warranties or guarantees, express or implied,
regarding the products or services described herein or their use or
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are available upon request. We reserve the right to modify or improve the
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remains solely with the purchaser.
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