AMOT MPX-501, MPX-300, MPX-303, MPX-310, MPX-500 Maintenance Manual

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Page 1

MPX-Series Diesel Engine Shut Down Valves (Manual Reset / Air Pressure and Manual Closure Options)

Selection, Application and Maintenance

Valve Numbers

MPX-300 MPX-301 MPX-302 MPX-303 MPX-310

MPX-500 MPX-501 MPX-502 MPX-503 MPX-510

MPX-800 MPX-801 MPX-802 MPX-803

CE236 (9) 1110 MPX

Page 2

DESCRIPTION

1/8" NPT for connecting air

pressure supply

Optional Hose Adaptors

C2 (min)

C2 (max)

Reset Lever

A range of 3”, 5” and 8” bore slim butterfly air intake shut down valves with air pressure actuated shut down combined with manual reset and the optional addition of manual shut down. Suitable for both hazardous and non-hazardous area applications. MPX valves are available in basic flange mounted form or fitted with hose adaptors. Valve body and disc are manufactured in corrosion resistant hard anodised aluminium with PTFE coating. The valve spindle and mechanism is made from stainless steel.

Notes:

Maximum temperature of the engine intake air at the MPX valve not to exceed 150°C. (See also ‘Installation” - page 5).

For alternative types of air pressure actuated Chalwyn valves see brochure CE218.

Main Dimensions (mm)

Valve Type

MPX-300 MPX-301 MPX-302 MPX-303

Nominal Bore

Diameter

76 (3”)

190.0

207.0

190.0

223.0

111.5

MPX-310

MPX-500 MPX-501 MPX-502 MPX-503

127 (5”)

246.0

263.0

246.0

279.0

167.0

MPX-510

346.5

MPX-800 MPX-801 MPX-802

203 (8”)

362.0

346.5

377.5

257.0

MPX-803

Valve Types MPX-300, MPX-500 and MPX-800

(Air Pressure Shut Down, Manual Reset)

37.5

45.5

56.0

minimum & maximum

82.5 to 112.5

102.0 to 157.5

136.5 to 185.5

MPX DIESEL ENGINE SHUTDOWN VALVES

CE236 (9)

Valve models MPX-310 and MPX-510 have a

built-in microswitch. This enables an indica-

tion of the valve open/close status. The micro-

switch connections are made as follows:

Brown = supply - common

Blue = makes circuit when valve is closed

Black = make circuit when valve is open

Maximum rating of microswitch at 12 or

24 V = 2 amp

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Page 3

Reset Lever

1/8" NPT for connecting air pressure supply

Optional Hose

daptors

Reset Lever

Stop Button

C2 (min) C2 (max)

Reset Lever

Valve Types MPX-301, MPX-501 and MPX-801

C2 (min)

C2 (max)

Optional Hose Adaptor

(One each side)

Cable Length Options

- see under “Selection”

“PULL” Type

Manual Stop

Reset Lever

(Air Pressure and Integral Stop Button Shut Down, Manual Reset)

Valve types MPX-302, MPX-502 and MPX-802

(Air Pressure and Remote “Push” Stop Button Shut down, Manual Reset

“Push” Type Stop Button Ass’y RBP-100

1/8" NPT for connecting air pressure supply

Reset Lever

Cable Length Options

- see under “Selection”

Optional Hose Adaptors

C2 (min)

C2 (max)

Valve Types MPX-303, MPX-503 and MPX-803

(Air Pressure and Remote “Pull” Shut Down, Manual Reset)

MPX DIESEL ENGINE SHUTDOWN VALVES

CE236 (9)

T: +44 (0)1284 715739

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Page 4

SELECTION

Determine the size and position of the MPX valve to be installed. Within the various constraints imposed in the application, the valve should be as generously sized as possible. Check that the valve can be positioned such that the reset lever and, where applicable, the stop button will be easily and safely accessible. For types with a remote manual stop, position the valve and select the cable length to give a reasonably straight cable run between the MPX valve and the proposed stop button position.

Air Pressure

A clean, dry air supply is required. An air pressure of approximately 2 bar is required to close the valve. Maximum air pressure must not exceed 10 bar.

Cable options for use with “PUSH” button RBP-100 To suit valves MPX-302, MPX-502, or MPX-802

Cable part No. Length (meters)

CLP-100 1.0

CLP-150 1.5

CLP-200 2.0

CLP-300 3.0

Select the required length of the manual shut down cable from the table . Alternative lengths may be available on request. Also order push button assembly RBP-100.

If the valve is to be fitted into a hose as opposed to flange mounted, suitable hose adaptors may be selected from the table below for ordering with the valve.

Cable options for use with “PULL” handle RTD-100

To suit valves MPX-303, MPX-503, or MPX-803

Cable part No. Length (meters)

CLD-100 1.0

CLD-150 1.5

CLD-200 2.0

CLD-300 3.0

Select the required length of the manual shut down cable from the table . Alternative lengths may e available on request. Also order handle RTD-100.

Hose Adaptor Options

76mm (3”) Bore Valves

Adaptor To Suit Hose Bore Part Number mm (inches)

HAX-320 38 ( 11/2)

HAX-322 44.5 (13/4)

HAX-301 51 (2)

HAX-302 54 (2 1/8)

HAX-303 57 (2 1/4)

HAX-304 60 (2 3/8)

HAX-305 63.5 (2

HAX-306 67 (2 5/8)

HAX-307 70 (2 3/4)

HAX-308 73 (2 7/8)

HAX-309 76 (3)

HAX-314 89 (3 1/2)

HAX-319 102 (4)

203mm (8”) Bore Valves

Adaptor To Suit Hose Bore Part Number mm (inches)

HAX-807 178 (7)

HAX-808 203 (8)

/2)

127mm (5”) Bore Valves

Adaptor To Suit Hose Bore Part Number mm (inches)

HAX-501 89 (3 1/2)

HAX-502 92 (3 5/8)

HAX-503 95 (3 3/4)

HAX-504 98 (3 7/8)

HAX-505 102 (4)

HAX-506 105 (4 1/8)

HAX-507 108 (4 1/4)

HAX-508 111 (4 3/8)

HAX-509 114 (4 1/2)

HAX-510 117.5 (4 5/8)

HAX-511 121 (4 3/4)

HAX-512 124 (4 7/8)

HAX-513 127 (5)

HAX-518 140 (5 1/2)

HAX-523 152 (6)

MPX DIESEL ENGINE SHUTDOWN VALVES

CE236 (9)

T: +44 (0)1284 715739

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Page 5

INSTALLATION

Cable lock nut wound fully back

Check end of inner is burr free

20 to 22mm

Cable lock nut wound fully back

Check end of inner is burr free

20 to 22mm

1. In the case of a naturally aspirated engine the Chalwyn MPX shut down valve should generally be fitted as close to the engine air intake manifold as possible. If an air intake flame trap is also

fitted, the MPX valve must be installed upstream

(air cleaner side) of the flame trap.

2. To avoid excessively high intake air temperatures at the MPX valve when fitted to a turbocharged engine, it may be necessary to fit the valve either upstream of the turbocharger or downstream of the intercooler (where fitted). Again, if an air intake flametrap is also installed, the valve must be fitted upstream of the flametrap.

3. Where more than one MPX valve is fitted to an engine, as in the case of an engine with multiple intake pipes, a common pneumatic supply to the valves should be used to ensure that all valves close simultaneously.

4. The MPX valve may be installed either horizontally or vertically. Air flow may be in either direction through the valve. Ensure easy and safe access to the valve reset lever and, where applicable, manual stop control. If the valve is fitted with a cable operated manual stop ensure a reasonably straight run for the cable.

5. If hose adaptors are used, the mating hose should be of a reinforced type, provide adequate support for the valve and prevent excessive vibration. If necessary, additional support brackets mounted from the engine should be considered.

8. For valves with the “Push” button cable operated manual shut down, drill a Ø10mm (3/8” clearance) hole through the bulkhead (or bracket) to which the stop button is to be mounted. Pass cable end through hole. With the MPX valve in the latched open position check that, with the cable inner pressed hard back into the cable outer, between 20mm and 22mm of the inner shows.

. With the MPX valve still latched open, use

a 2mm A/F hexagon key to release the cable grip screw in assembly RBP-100 to enable the assembly to be fully screwed onto the cable outer.

Then tighten the cable locknut onto the back

face of the bulkhead. Finally, fully tighten the cable grip screw (see diagram below).

RBP-100

6. Particular care must be taken to ensure the

7. Any engine crankcase breather connections

integrity of the intake pipework between the Chalwyn valve and intake manifold. Ideally metal pipework should be used and any gaps kept as short as possible, (taking into account any relative movement) and closed by reinforced hose. The possibility of a hose collapse on closure of the shut down valve must be avoided.

into the intake system between the MPX valve and engine, or any internal crankcase breather arrangement venting directly into the engine intake ports must be sealed and replaced by an external breather system venting either to atmosphere or to the intake system upstream of the shut down valve. External breather system kits for various engine types are available from Chalwyn.

MPX DIESEL ENGINE SHUTDOWN VALVES

CE236 (9)

Lock nut - tighten after fully screwing RBP-100 onto the cable outer

Cable Grip Screw

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Page 6

9. For values with the “pull” handle cable

‘T’ HANDLE

HANDLE LOCKNUT

STOP CABLE

UPPER LOCK NUT

LOWER LOCK NUT

HANDLE BODY

BULKHEAD MOUNTING BRACKET

operated manual shut down, fit the ‘T’ handle assembly RTD-100 through a suitable Ø20mm (3/4”dia) hole in a bulkhead or mounting bracket as follows. Release the handle locknut. Remove the handle, handle locknut and upper locknut and washer. Thread handle body through the bulk- head/bracket. Refit upper locknut and washer. Adjust lower and upper locknuts to position handle and tighten. Refit handle locknut and handle. Tighten locknut.

10. Connect shut down air supply using the 1/4NPT

tapping on valve. Means must be provided to release any trapped air pressure at the MPX valve connection when the air pressure shut down signal is not being applied.

11. Prior to putting the engine into service the checks listed under “Monthly” maintenance should first be completed (see page 7).

MPX DIESEL ENGINE SHUTDOWN VALVES

CE236 (9)

T: +44 (0)1284 715739

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Page 7

OPERATION

Prior to starting the diesel engine the MPX valve must be latched in the open position by rotating the reset lever clockwise as far as possible. Once latched, the reset lever and valve will remain in the latched open position until released by application of air pressure or by operating the stop button.

After an emergency shut down by air pressure or by operating the stop button, the MPX valve must always be reset before re-starting the engine.

After a normal (diesel fuel only) shut down, the MPX valve will not require reset.

MAINTENANCE

MONTHLY:

Check that all intake system fasteners and any associated support bracket fasteners are securely tightened.

Check that any intake system hoses between the MPX valve and engine are free from damage and suitable for further service.

Run engine, preferably at or just above low idle speed. Apply shut down air pressure signal to valve. Check that the valve reset lever immediately rotates to the valve closed position and the engine stops within a few seconds.

Run engine, preferably at or just above low idle speed. Operate the manual shut down control. Check that the valve reset lever immediately rotates to the valve closed position and the engine stops within a few seconds.

Notes:

The engine must not be put back into service until any problems identified by the above checks are rectified.

MPX DIESEL ENGINE SHUTDOWN VALVES

CE236 (9)

T: +44 (0)1284 715739

[email protected]

Page 8

Chalwyn by AMOT

[email protected] www.chalwyn.com

A division of Roper Industries Limited

Western Way Bury St Edmunds Suffolk, IP33 3SZ Tel: +44 (0)1284 715739 Fax: +44 (0)1284 715747

USA

8824 Fallbrook Drive Houston TX 77064 Tel: +1 281 940 1800 Fax: +1 713 559 9419

Canada

3230 97 Street Edmonton Alberta, T6N 1K4 Tel: +1 780 465 4429 Fax: +1 780 469 6275

CHALWYN RESERVES THE RIGHT TO UPDATE THIS PRODUCT SPECIFICATION WITHOUT PRIOR NOTICE.