Instruction Manual Form 5434
Type OSE Slam-Shut Valve Introduction Scope of Manual This instruction manual provides installation, maintenance, and parts information for the Type OSE SlamShut Valve.
sure. The second stage is the power stage, once tripped the closing spring causes the valve plug to slam-shut and remains closed until the valve is manually reset. The second stage is submitted to all the inlet pressure variations and vibrations, none of which are transmitted to the first stage.
Incorporated in the Type OSE valve plug is an automatic equalizer bypass which balances pressures on each side of the valve plug when resetting.
The purpose of the Type OSE Slam-Shut Valve is to totally and rapidly cut the gas flow when the outlet pressure of the pressure regulator exceeds or drops below the setting. The Type OSE consists of a valve, a mechanism box and a modular sensing element (manometric device).
The Type OSE Slam-Shut Valve is suitable for all pressure set-points from 4-inches w.c. to 1044 psig (10 mbar to 72 bar) by simply replacing the modular sensing element (manometric device). There is also an optional manual emergency button and an optional explosion proof limit switch.
The detection of the pressure variances is sensed by a double stage mechanism. The first stage is the detection stage and will only trip when the outlet pressure of the pressure regulator reaches the set-pres-
Specifications Table 1 lists the specifications for the Type OSE Slam-Shut Valve.
Figure 1. Type OSE Slam-Shut Valves
Fisher, Fisher-Rosemount, and Managing The Process Better are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc. All other marks are the property of their respective owners. EFisher Controls International, Inc. 1997; All Rights Reserved 3/97
Type OSE Table 1. Specifications
Maximum Inlet Pressures (1) 1450 psig (100 bar)
Maximum Set Pressure (1) 1044 psig (72 bar) Maximum Flowing Pressure Drops Body Size Inches (DIN)
Pressure Registration External sensing line
Body: Steel (A216wcb) Bonnet: Steel (A350LF2) Valve Plug: 304L Stainless steel Valve Plug Seal Ring: Nitrile Seat Ring: 304L Stainless steel Mechanism Box: Aluminum alloy Mechanism: Steel Command Stem: Stainless steel Diaphragm: J Reinforced nitrile or J 316 stainless steel bellows Approximate Weight 1 2 3 4 6
Valve Plug Travel & Stem Diameter See Table 2 Manometric Device Specifications See Table 3
inch valve: inch valve: inch valve: inch valve: inch valve:
36 lbs (16 kg) 70 lbs (32 kg) 121 lbs (55 kg) 216 lbs (98 kg) 445 lbs (202 kg)
Temperature Capabilities(1) -20 to 140_ F (-29 to 60_ C)
Explosion proof remote switch Manual emergency button Additional manometric device for extra pressure sensing Weathertight mechanism box (the vent, 3/8-inch NPT, must be piped to a weathertight location and this option does not include the travel indicator)
Pressure Sensing Connection 1/4-inch NPT Vent Connection 3/8-inch NPT
1. The pressure/temperature limits in this manual and any applicable standard or code limitation should not be exceeded.
Table 2. Valve Plug Travel and Stem Diameter BODY SIZE Inches, (DIN) 1 (25)
VALVE PLUG TRAVEL Inches, (mm) 1/2 (15)
VALVE PLUG STEM DIAMETER Inches, (mm)
D Service conditions are within applicable codes, regulations, or standards. D Additionally, physical damage to the slam-shut valve could break the mechanism box off the main valve, causing personal injury and property damage due to escaping gas. To avoid such injury or damage, install the unit in a safe location. Clean out all pipelines before installation and check to be sure the valve has not been damaged or collected foreign material during shipment.
Installation WARNING Personal injury, equipment damage, or leakage due to escaping gas or bursting of pressure-containing parts may result if the slam-shut valve is installed where its capabilities can be exceeded or where conditions exceed any ratings of the adjacent piping or piping connections. To avoid this, install the slamshut valve where;
D Service conditions are within unit capabilities.
Use suitable line gaskets and good bolting practices with a flanged body. The Type OSE may be installed in any position, but is normally installed in a horizontal pipeline with the mechanism box above the body (See figure 2). When installing the optional weathertight mechanism box, the vent must be relocated (piped) to keep the mechanism box from collecting moisture and/or other foreign material. Install obstruction-free tubing or piping into the 3/8-inch NPT vent tapping. Provide protection on the relocated vent by installing a screened vent cap into the end of the vent pipe.
Type OSE DOWNSTREAM SENSING LINE
UPSTREAM BLOCK VALVE
TYPE OSE SLAM-SHUT VALVE OPTIONAL STRAINER W6933/IL
Figure 2. Typical Installation Schematic
The Type OSE can be used along with a token relief valve to minimize unnecessary shutoff. The relief valve is set to open before the Type OSE slam-shut valve activates. This arrangement allows the relief valve to handle minor overpressure problems such as gas thermal expansion or seat leakage due to dirt moving through the system which may move out of the regulator during the next operating cycle. The slamshut valve does activate if the regulator has a major malfunction with excessive gas flow that exceeds the token relief capacity.
The manometric device requires a downstream sensing line which should be tapped into a straight run of pipe two to three feet (0.6 to 0.9 meter) downstream of the regulator. If impossible to comply with this recommendation due to the pipe arrangement, it may be better to make the sensing line tap nearer the regulator outlet rather than downstream of a block valve. Do not make the tap near any elbow, swage, or nipple which might cause turbulence.
Table 3. Manometric Device Specifications
SPRING RANGE(1), PSIG (BAR)
MAXIMUM WORKING PRESSURE, PSIG (BAR)
MANOMETRIC DEVICE TYPE NUMBER
DIAPHRAGM OR BELLOWS
SET POINT SPRING PART TOLERANCE(2), NUMBER PSIG (BAR)
MAXIMUM DIFFERENCE BETWEEN OVERPRESSURE AND UNDERPRESSURE(3), PSIG (BAR)
0.3 to 1.2 (0.02 to 0.08)
0.5 to 2.3 (0.03 to 0.16)
7 to 36 (0.41 to 2.48)
15 to 80 (1.03 to 5.50)
1.0 to 5.8 (0.07 to 0.40) 2 to 11 (0.14 to 0.76)
30 to 160 (2.07 to 11.03) 60 to 230 (4.14 to 15.86) 55 to 295 (3.79 to 20.34) 110 to 510 (7.45 to 35.16) 200 to 1045 (13.8 to 72.06)
72 psig (4.9 bar)
230 psig (15.86 bar)
510 psig (35.16 bar)
1045 psig (72.06 bar)
1. The listed springs are standard spring ranges. For other spring ranges, contact your local Sales Representative or Fisher sales office. 2. Minimum suggested difference between slam-shut set pressure and normal operating pressure of the system. 3. Maximum difference between overpressure and underpressure when using one manometric device with tripping hook (see figure 4). For underpressure and overpressure set points greater than this maximum number, use a separate manometric device for underpressure protection.
Type OSE MECHANISM BOX
FIRST STAGE RESET PIN (RED)
SET POINT ADJUSTMENT RING MANOMETRIC DEVICE (SENSING UNIT)
SECOND STAGE RESET SHAFT
RESET AND ADJUSTMENT TOOL
Figure 3. Type OSE Release Relay
Maintenance Resetting the Trip Mechanism Resetting of the Type OSE Slam-Shut Valve is done manually. After the Type OSE has closed (see figure 3), it must be manually reset before it can be placed back in service. Before resetting the Type OSE, check for and correct the reason for the overpressure/ underpressure condition. To reset the Type OSE, close the upstream block valve. Open the front cover of the mechanism box. In the top center location of the box, there is a red pin. Push this pin up and to the right. This action will lock in stage one. To reset the second stage use the square reset tool located in the lower left corner of the mechanism box. Place the square end of the tool on the square shaft in the center of the box and slowly rotate clockwise. When movement is started on the stem the internal bypass will open and equalize the pressure on each side of the valve plug before the valve plug can be moved off the seat. Continue turning the reset tool, this will raise the valve plug, compress the closing spring and latch the second stage mechanism. Replace the reset tool on its holder and replace the cover. Slowly open the upstream block valve.
WARNING Avoid personal injury or damage to property from sudden release of pressure or uncontrolled gas or other process fluid. Before disassembling, carefully relieve all pressures. Use gauges to monitor inlet and outlet pressures while releasing these pressures. Note The only parts that are replaceable on the Type OSE are the equalizer bypass component and the sealing components. The seat ring is pressed into the body and is not field removable. 1. Open the mechanism box cover (refer to figure 8).
CAUTION Trip the mechanism if it is not already released to remove as much spring tension on the stem as possible. 2. Trip the mechanisim by carefully turning the square tripping plate located by the manometric device stem (refer to figure 8).
Type OSE 3. Remove the screw and the red travel indicator (refer to figure 4). Pull the pin from the sliding clevis releasing the clevis so it can be turned and detached from the stem.
RED TRAVEL INDICATOR
7. Use a spanner wrench (a wrench is supplied with one of the replacement parts kits) to unscrew the equalizer bypass from the valve plug (refer to figure 5). The 1-inch body size equalizer bypass holds the seat seal O-ring to the valve plug. On the 2-inch and 3-inch sizes the equalizer bypass holds the plug disc and the seat seal O-ring to the valve plug. The 4 and 6-inch sizes valve plug disc and valve plug are held together by six cap screws. On these sizes remove the cap screws and valve plug disc to replace the seat seal O-ring (refer to figure 8).
COUPLING HEAD COUPLING
Figure 6. Equalizer Bypass, Coupling and Coupling Head W6854/IL
Figure 4. Releasing stem of mechanism box
4. Remove the two cap screws holding the mechanism box to the bonnet and remove the mechanism box (refer to figure 8). 5. Remove the nuts or cap screws holding the bonnet to the body 6. The bonnet, valve plug (with equalizer bypass), closing spring, stem, and stuffing box will lift out of the body as a unit. Set the unit on a hard flat surface on the valve plug and press down on the bonnet to compress the closing spring allowing the stem to be unhooked from the coupling head. COUPLING HEAD
HOLES FOR SPANNER WRENCH
SEAT SEAL O-RING
EQUALIZER BYPASS VALVE PLUG DISC
Figure 5. Valve Plug and Equalizer Bypass
Note The equalizer bypass is a common part between all valve plug sizes. The equalizer bypass is not serviceable and has to be replaced as a unit. 8. To remove the equalizer bypass from the coupling and coupling head, drive out the roll pin on the coupling (refer to figure 6).
Assembly 1. Attach a new equalizer bypass to the coupling using a roll pin (refer to figure 6). 2. Screw the equalizer bypass into the valve plug with the plug disc and a new seat seal O-ring (key 5, figure 7). Be careful not to nick or pinch the O-ring when tightening the equalizer bypass. On the 4 and 6-inch body sizes attach the plug disc and a new seat seal O-ring to the valve plug using six cap screws (refer to figure 8). 3. Replace the valve plug guides (key 7, figure 8) on the inside of the skirt of the bonnet. 4. Place a new O-ring (key 2, figure 8) on the stuffing box (key 1, figure 8). Set the valve plug assembly on a hard flat surface. Set the closing spring in place on the valve plug. Place the bonnet on the spring and compress the spring by pressing down on the bonnet. Attach the stem to the coupling head of the valve plug through the bonnet. Slowly release the bonnet allowing spring tension to seat the stuffing box in the bonnet, be careful to properly seat the stuffing box O-ring.
Type OSE 5. Place the bonnet assembly into the body using a new gasket (key 10, figure 8) and a new O-ring (key 11, figure 8) Secure the bonnet by tightening down the nuts or capscrews. 6. Place the mechanism box onto the bonnet and attach using the two capscrews. 7. Hook the sliding clevis to the stem and insert the pin (refer to figure 4). Secure the pin using the red travel indicator and a screw. 8. To reset see Resetting the Trip Mechanism.
Key 3 4 5
When corresponding with your Fisher sales office or sales representative about this equipment, always reference the equipment serial number or FS number. When ordering replacement parts, also be sure to include the complete 11-character part number from the following parts list.
Parts List Key
Parts kit, includes keys 5, 7, 10 and 11 1-inch 2-inch 3-inch 4-inch 6-inch Parts kit, includes all the above plus key 4, and a spanner wrench 1-inch 2-inch 3-inch 4-inch 6-inch Stem with Stuffing box, Steel O-ring, Nitrile
Part Number 11 FA197123X12 FA197130X12 FA197132X12 FA197134X12 FA197136X12
FA197124X12 FA197131X12 FA197133X12 FA197135X12 FA197137X12 FA180341X12 FA400514X12
Description Resetting Tool Equalizer bypass, Steel O-ring, Nitrile 1-inch 2-inch 3-inch 4-inch 6-inch Guide, Nitrile (2 reqâ€™d) 1-inch 2-inch 3-inch 4-inch 6-inch Diaphragm, Nitrile Manometric device Type 162 Type 071 Bellows, Stainless steel Manometric device Type 236 Type 315 Gasket, Composite 1-inch 2-inch 3-inch 4-inch 6-inch O-ring, Nitrile 1-inch 2-inch 3-inch 4-inch 6-inch Gasket, Composite Manometric device Type 162 Type 071 Gasket, Composite Manometric device Type 071 Type 236 Type 315 Control Set-Point Spring
FA400257X12 FA400263X12 FA400258X12 FA400260X12 FA400261X12 FA401950X12 FA401951X12 FA401952X12 FA401953X12 FA401954X12
14A6785X012 14A5685X012 14A5665X012 14A5650X012 14A6984X012 FA400009X12 FA400024X12 FA400259X12 FA400045X12 FA400262X12
FA124495X12 FA401538X12 FA401538X12 See Table 1
MANOMETRIC DEVICE TYPE 071
MANOMETRIC DEVICE TYPES 236 AND 315
Figure 7. Manometric Device Assemblies
Part Number FA126999X12 FA180977X12
Type OSE MANOMETRIC DEVICE STEM
MECHANISM BOX COVER SQUARE TRIPPING PLATE MECHANISM BOX
MANOMETRIC DEVICE TYPE 162
CONTROL SET-POINT SPRING
VALVE PLUG DISC
4 AND 6-INCH VALVE PLUG CONSTRUCTION
1-INCH VALVE PLUG CONSTRUCTION
Figure 8. 2 And 3-Inch Type OSE Slam-Shut Valve Assembly
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they arenot tobe construedas 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 specifications of such products at any time without notice.
For information, contact Fisher Controls: Marshalltown, Iowa 50158 USA 28320 Gallardon France Sao Paulo 05424 Brazil Singapore 0512 8
Printed in U.S.A.