Bourdon Tube es Ranges to 8000 psi (55. bar) FEATURES Visible calibrated dial On/off indication (except hermetically sealed snap switch models) Adjustable or fixed deadband SPT snap-action, hermetically sealed snap action or hermetically sealed mercury switch External switch setpoint adjustments Minimum deadband is obtainable at any point in the range Ranges of full vacuum to 8000 psig. UL listed, CSA approved. Many models FM approved. General purpose, weatherproof or explosion-proof enclosures Customers tell us that this is the best pressure switch made. The Mercoid is one of the world s broadest lines of pressure switches. Whatever your application might be, it is most probable it can be fully satisfied with a pressure switch. The has extremely high sensitivity and great repeatablility. The A Models are equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure operating point., the difference between high and low setpoints, is adjustable over the full scale. The S Models are equipped with a single external adjustment for setting operating point only. The deadband is fixed at a factory setting and cannot be altered in the field. For switches choose between the snap action switch, hermetically sealed snap action switch and hermetically sealed mercury switch. SPECIFICATIONS Wetted Materials: Brass, 40 SS, or SS. Temperature Limit: 80 F (82 C). Limit: Maximum pressure of the operating range. Enclosure Rating: General purpose, weatherproof or explosionproof. Repeatability: ±% of full operating range, ±.5% on S-00 models. Type: SPST mercury switch, SPT mercury switch, SPT snap switch, or SPT hermetically sealed snap switch. Other circuit types available. Electrical Rating: See model charts. Electrical Connections: Screw terminal. Conduit Connection: General purpose: /2 hole for conduit hub. Weatherproof: /2 conduit hub. Explosion-proof: /4 female NPT. Process Connection: General purpose and weatherproof: /4 male NPT, /2 male NPT on ranges 5S and S. Explosion-proof: /2 male NPT and /4 female NPT. Mounting Orientation: Vertical. Set Point Adjustment: Thumbscrew. Weight: General purpose: 4 lb (.8 kg), weatherproof: lb (2. kg), explosion-proof: 8 lb (.5 kg). : See model chart. How to Order Mercoid es Operating Requirements is the generic designation for the pressure switch series. The next letter following the designates the function of the switch with regard to the type of deadband and operation. A, for example, means a series pressure switch that has an adjustable deadband with double adjustments and is fully automatic. See page 0 for more information. Enclosures A general purpose NEMA enclosure is furnished as standard on all pressure switches. Weatherproof and explosion-proof housings are optionally available and designated by adding a third character to the model number. AW, for example, indicates a A pressure switch with a weatherproof enclosure. See page for more information. Wetted Material The is available with Bourdon tubes constructed of brass, Type 40 stainless steel, and Type stainless steel. Material is designated as part of the series type number with corresponding to brass, 2 to 40 stainless steel, and 4 to stainless steel. For example, A-, A-0, S-2, and A-5 all have brass bourdon tubes. Shown in the left hand column of the sample model number charts on pages and 2. Type and Action Mercoid pressure switches are available with mercury or snap-action contacts. Snap-action switch models always start with the series type number of. For example, A-0 and S-2 are both snap switch models. Snap switches are availale in SPT and PT while the mercury switches are available in SPST, SPT, PT, and PST. The switch code designates the type of contact and follows the series type number in the overall model number. For example, A-0-5 is a SPT snap switch while A--5 is a SPT mercury switch. Contact rating should also be considered when choosing the contact type. Shown across the top of the columns of the sample model number charts on pages and 2. Operating Range The last part of the model number is the operating range number. Operation of the switch is adjustable within the limits of the shown operating range. The upper limit of the adjustable operating range is also the maximum pressure for the switch and should not be exceeded. For example, AW---2 has range number 2, which is 0 to 0 Hg vacuum. Shown in the second column of the sample model number charts on pages and 2. A complete model number chart is included on pages and. wyer Instruments, Inc. P.O. Box /Michigan City, Indiana 4/Phone 29 89-8000/Fax 29 82-905 U.K. Phone (+44) (0)494-40 Australia Phone 2 422-2055 9
Bourdon Tube es Type A Adjustable, Fully Automatic, ouble Adjustments Type R Semi-Automatic, Manual Reset, Single Adjustment OUBLE S Mercury RESET Manual Reset SWITCH INICATOR OUBLE S Snap- Action Contact Equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure operating point., or the difference between high and low setpoints, is adjustable over full scale. Mercoid s most popular operating mode, available on most pressure and temperature controls. Type S Fixed, Fully Automatic, Single Adjustment SWITCH INICATOR Mercury Snap- Action Contact Equipped with single adjustment for setting operating point only. A single pointer on scale sets pressure point at which switch action occurs. Fixed deadband is factory set and cannot be altered in the field. Available on series -200, -200 and -9200 only. Equipped with a single adjustment for setting operating point to operate the circuit automatically upon a pressure increase or decrease. Pushbutton reset must be operated manually to restore the circuit to original position after automatic operation. Suffix L, i.e. R--5L denotes control will operate automatically on increase; suffix U denotes control will operate automatically on decrease. Type L Semi-Automatic, Manual Lock Reset, Single Adjustment RESET Manual Lock Reset Equipped with a single adjustment for setting operating point. Control will operate at setpoint only upon a decrease in pressure. Manual lock feature permits circuit to be reset and locked in position. Lock remains in effect until pressure rises above control setting. Lock then releases and circuit is held in reset position until further automatic operation upon pressure decrease. Type -400, A-400 Two-Stage, Fully Automatic, 2 Set Pts. Provides two stage control by actuating one circuit upon a rise or fall in pressure and a second circuit on a further rise or fall. Each setpoint has a fixed deadband. 0 wyer Instruments, Inc. P.O. Box /Michigan City, Indiana 4/Phone 29 89-8000/Fax 29 82-905 U.K. Phone (+44) (0)494-40 Australia Phone 2 422-2055
STOCKE MOELS in bold with Mercury and General Purpose Enclosure Bourdon Adjustable Minimum SPT SPST SPST Minimum SPST SPST Tube Operating 4A @ 20 V Open on Close on 5A @ 20 VAC 5A @ 20 VAC Material Range 2A @ 240 V Increase Increase 2A @ 240 VAC 2A @ 240 VAC AC/C 0A @ 20 V 0A @ 20 V 2.5A @ 20 VC 2.5A @ 20 VC 5A @ 240 V 5A @ 240 V A @ 240 VC A @ 240 VC AC/C AC/C (Open ) (Close ) 0-0 Hg Vac 2 Hg A--5-2 A--2-2 A---2 Hg A-5-2-2 A-5--2 0 Hg Vac - 2 A--5- A--2- A--- 0.5 A-5-2- A-5-- 25 Hg Vac - 50.5 A--5-2 A--2-2 A---2 2 A-5-2-2 A-5--2 /8 5 A--5- A--2- A--- 0.5 A-5-2- A-5-- /8 20 A--5-A A--2-A A---A 0.5 A-5-2-A A-5--A Brass 5.5 A--5-4 A--2-4 A---4 0.5 A-5-2-4 A-5--4 2 0 A--5-5 A--2-5 A---5 A-5-2-5 A-5--5 5 00.5 A--5- A--2- A--- 2 A-5-2- A-5-- 5 50 A--5- A--2- A--- A-5-2- A-5-- 0 200 8 A--5-8 A--2-8 A---8.5 A-5-2-8 A-5--8 0 00 2 A--5-9 A--2-9 A---9 A-5-2-9 A-5--9 0 Hg Vac 0 A-2-5-25S A-2-2-25S A-2--25S A-52-2-25S A-52--25S 0 Hg Vac 5 8 A-2-5-2S A-2-2-2S A-2--2S 4 A-52-2-2S A-52--2S 2 0 4 A-2-5-5S A-2-2-5S A-2--5S 2.5 A-52-2-5S A-52--5S 5 00 A-2-5-S A-2-2-S A-2--S A-52-2-S A-52--S 0 200 8 A-2-5-8S A-2-2-8S A-2--8S 4 A-52-2-8S A-52--8S 40 0 00 4 A-2-5-9S A-2-2-9S A-2--9S A-52-2-9S A-52--9S 40 50 4 A-2-5-9AS A-2-2-9AS A-2--9AS A-52-2-9AS A-52--9AS 25 00 25 A-2-5-0S A-2-2-0S A-2--0S 5 A-52-2-0S A-52--0S 50 000 0 A-2-5-S A-2-2-S A-2--S 40 A-52-2-S A-52--S 00 500 90 A-2-5-2S A-2-2-2S A-2--2S 50 A-52-2-2S A-52--2S 00 2500 50 A-2-5-S A-2-2-S A-2--S 00 A-52-2-S A-52--S 500 5000 450 A-2-5-5S A-2-2-5S A-2--5S 200 A-52-2-5S A-52--5S 800 8000 50 A-2-5-S A-2-2-S A-2--S 400 A-52-2-S A-52--S 0 Hg Vac 5 A-4-5-2E A-4-2-2E A-4--2E.5 A-54-2-2E A-54--2E 5 5 A-4-5-2E A-4-2-2E A-4--2E 2 A-54-2-2E A-54--2E 0 00 A-4-5-E A-4-2-E A-4--E.5 A-54-2-E A-54--E 0 50 A-4-5-24E A-4-2-24E A-4--24E A-54-2-24E A-54--24E 0 00 8 A-4-5-9E A-4-2-9E A-4--9E 5 A-54-2-9E A-54--9E 0 400 0 A-4-5-2E A-4-2-2E A-4--2E 5 A-54-2-2E A-54--2E 5 800 5 A-4-5-22E A-4-2-22E A-4--22E 5 A-54-2-22E A-54--22E 00 000 00 A-4-5-E A-4-2-E A-4--E 45 A-54-2-E A-54--E 200-2500 20 A-4-5-E A-4-2-E A-4--E 0 A-54-2-E A-54--E with Snap Action and General Purpose Enclosure Adjustable Fixed Hermetically Sealed, Fixed SPT: 5A @ 20/240 VAC SPT: 5A @ 20/240 AC SPT: 5A @ 20/240 VAC, 5A res. @ 0 VC Bourdon Adjustable Minimum Model Fixed Model Fixed Model Tuberial Operating Range Number Number Number Material 0-0 Hg Vac 9 Hg A-0-5-2 Hg S-2-5-2 5 Hg S--5-2 0 Hg Vac - 2 4 A-0-5-.5 S-2-5- S--5-25 Hg Vac - 50 8 A-0-5-2 2.5 S-2-5-2.5 S--5-2 /8 5 4 A-0-5-.5 S-2-5- S--5- /8 20 4 A-0-5-A.5 S-2-5-A S--5-A Brass 5 5 A-0-5-4.5 S-2-5-4 S--5-4 2 0 A-0-5-5 2 S-2-5-5 S--5-5 5 00 9 A-0-5- 2.5 S-2-5-.5 S--5-5 50 A-0-5- S-2-5- 5.25 S--5-0 200 A-0-5-8 4 S-2-5-8.5 S--5-8 0 00 25 A-0-5-9 5 S-2-5-9 9 S--5-9 0 Hg Vac 0 2 A-02-5-25S.5 S-22-5-25S 5.25 S-2-5-25S 0 Hg Vac 5 5 A-02-5-2S.5 S-22-5-2S 5.25 S-2-5-2S 2 0 9 A-02-5-5S S-22-5-5S 4.5 S-2-5-5S 5 00 A-02-5-S.5 S-22-5-S 5.25 S-2-5-S 40 0 200 5 A-02-5-8S 4 S-22-5-8S.25 S-2-5-8S 0 00 9 A-02-5-9S S-22-5-9S 0.5 S-2-5-9S 40 50 20 A-02-5-9AS S-22-5-9AS 0.5 S-2-5-9AS 25 00 45 A-02-5-0S 0 S-22-5-0S 8 S-2-5-0S 50 000 95 A-02-5-S 20 S-22-5-S S-2-5-S 00 500 0 A-02-5-2S 0 S-22-5-2S 52.5 S-2-5-2S 00 2500 20 A-02-5-S 0 S-22-5-S 90 S-2-5-S 500 5000 900 A-02-5-5S 200 S-22-5-5S 00 S-2-5-5S 800 8000 500 A-02-5-S 500 S-22-5-S 0 Hg Vac 5 0 A-04-5-2E.5 S-24-5-2E 5.25 S-4-5-2E 5 5 8 A-04-5-2E 4 S-24-5-2E S-4-5-2E 0 00 0 A-04-5-E.5 S-24-5-E 5.25 S-4-5-E 0 50 A-04-5-24E 4 S-24-5-24E.5 S-4-5-24E 0 00 28 A-04-5-9E 8 S-24-5-9E 2 S-4-5-9E 0 400 52 A-04-5-2E 0 S-24-5-2E 8 S-4-5-2E 5 800 20 A-04-5-22E 25 S-24-5-22E.5 S-4-5-22E 00 000 90 A-04-5-E 5 S-24-5-E 52.5 S-4-5-E 200-2500 400 A-04-5-E 5 S-24-5-E 2.5 S-4-5-E wyer Instruments, Inc. P.O. Box /Michigan City, Indiana 4/Phone 29 89-8000/Fax 29 82-905 U.K. Phone (+44) (0)494-40 Australia Phone 2 422-2055
STOCKE MOELS in bold with Mercury and Weatherproof Enclosure Bourdon Tube Material Adjustable Operating Range Minimum SPT 4A @ 20 V 2A @ 240 V AC/C SPST Open 0A @ 20 V 5A @ 240 V AC/C Adjustable SPST Close 0A @ 20 V 5A @ 240 V AC/C Minimum SPST Open 5A @ 20 VAC 2A @ 240 VAC 2.5A @ 20 VC A @ 240 VC SPST Close 5A @ 20 VAC 2A @ 240 VAC 2.5A @ 20 VC A @ 240 VC Brass 40 0-0 Hg Vac 0 Hg Vac - 2 25 Hg Vac - 50 /8 5 /8 20 5 2 0 5 00 5 50 0 200 0 00 0 Hg Vac 0 0 Hg Vac 5 2 0 5 00 0 200 0 00 40 50 25 00 50 000 00 500 00 2500 500 5000 800 8000 0 Hg Vac 5 5 5 0 00 0 50 0 00 0 400 5 800 00 000 200-2500 2 Hg.5.5.5 8 2 8 4 8 4 4 25 0 90 50 450 50 8 0 5 00 20 AW--5-2 AW--5- AW--5-2 AW--5- AW--5-A AW--5-4 AW--5-5 AW--5- AW--5- AW--5-8 AW--5-9 AW-2-5-25S AW-2-5-2S AW-2-5-5S AW-2-5-S AW-2-5-8S AW-2-5-9S AW-2-5-9AS AW-2-5-0S AW-2-5-S AW-2-5-2S AW-2-5-S AW-2-5-5S AW-2-5-S AW-4-5-2E AW-4-5-2E AW-4-5-E AW-4-5-24E AW-4-5-9E AW-4-5-2E AW-4-5-22E AW-4-5-E AW-4-5-E AW--2-2 AW--2- AW--2-2 AW--2- AW--2-A AW--2-4 AW--2-5 AW--2- AW--2- AW--2-8 AW--2-9 AW-2-2-25S AW-2-2-2S AW-2-2-5S AW-2-2-S AW-2-2-8S AW-2-2-9S AW-2-2-9AS AW-2-2-0S AW-2-2-S AW-2-2-2S AW-2-2-S AW-2-2-5S AW-2-2-S AW-4-2-2E AW-4-2-2E AW-4-2-E AW-4-2-24E AW-4-2-9E AW-4-2-2E AW-4-2-22E AW-4-2-E AW-4-2-E AW---2 AW--- AW---2 AW--- AW---A AW---4 AW---5 AW--- AW--- AW---8 AW---9 AW-2--25S AW-2--2S AW-2--5S AW-2--S AW-2--8S AW-2--9S AW-2--9AS AW-2--0S AW-2--S AW-2--2S AW-2--S AW-2--5S AW-2--S AW-4--2E AW-4--2E AW-4--E AW-4--24E AW-4--9E AW-4--2E AW-4--22E AW-4--E AW-4--E Hg 0.5 2 0.5 0.5 0.5 2.5 4 2.5 4 5 40 50 00 200 400.5 2.5 5 5 5 45 0 AW-5-2-2 AW-5-2- AW-5-2-2 AW-5-2- AW-5-2-A AW-5-2-4 AW-5-2-5 AW-5-2- AW-5-2- AW-5-2-8 AW-5-2-9 AW-52-2-25S AW-52-2-2S AW-52-2-5S AW-52-2-S AW-52-2-8S AW-52-2-9S AW-52-2-9AS AW-52-2-0S AW-52-2-S AW-52-2-2S AW-52-2-S AW-52-2-5S AW-52-2-S AW-54-2-2E AW-54-2-2E AW-54-2-E AW-54-2-24E AW-54-2-9E AW-54-2-2E AW-54-2-22E AW-54-2-E AW-54-2-E AW-5--2 AW-5-- AW-5--2 AW-5-- AW-5--A AW-5--4 AW-5--5 AW-5-- AW-5-- AW-5--8 AW-5--9 AW-52--25S AW-52--2S AW-52--5S AW-52--S AW-52--8S AW-52--9S AW-52--9AS AW-52--0S AW-52--S AW-52--2S AW-52--S AW-52--5S AW-52--S AW-54--2E AW-54--2E AW-54--E AW-54--24E AW-54--9E AW-54--2E AW-54--22E AW-54--E AW-54--E with Snap Action and Weatherproof Enclosure Bourdon Tube Material Brass 40 Adjustable Operating Range Minimum Adjustable SPT: 5A @ 20/240 VAC Model Number Fixed SPT: 5A @ 20/240 VAC Fixed Model Number Hermetically Sealed, Fixed SPT: 5A @ 20/240 VAC, 5A res.@0 VC Fixed Model Number 0-0 Hg Vac 9 Hg AW-0-5-2 Hg SW-2-5-2 5 Hg SW--5-2 0 Hg Vac - 2 4 AW-0-5-.5 SW-2-5- SW--5-25 Hg Vac - 50 8 AW-0-5-2 2.5 SW-2-5-2.5 SW--5-2 /8 5 4 AW-0-5-.5 SW-2-5- SW--5- /8 20 4 AW-0-5-A.5 SW-2-5-A SW--5-A 5 5 AW-0-5-4.5 SW-2-5-4 SW--5-4 2 0 AW-0-5-5 2 SW-2-5-5 SW--5-5 5 00 9 AW-0-5- 2.5 SW-2-5-.5 SW--5-5 50 AW-0-5- SW-2-5- 5.25 SW--5-0 200 AW-0-5-8 4 SW-2-5-8.5 SW--5-8 0 00 25 AW-0-5-9 5 SW-2-5-9 9 SW--5-9 0 Hg Vac 0 2 AW-02-5-25S.5 SW-22-5-25S 5.25 SW-2-5-25S 0 Hg Vac 5 5 AW-02-5-2S.5 SW-22-5-2S 5.25 SW-2-5-2S 2 0 9 AW-02-5-5S SW-22-5-5S 4.5 SW-2-5-5S 5 00 AW-02-5-S.5 SW-22-5-S 5.25 SW-2-5-S 0 200 5 AW-02-5-8S 4 SW-22-5-8S.25 SW-2-5-8S 0 00 9 AW-02-5-9S SW-22-5-9S 0.5 SW-2-5-9S 40 50 20 AW-02-5-9AS SW-22-5-9AS 0.5 SW-2-5-9AS 25 00 45 AW-02-5-0S 0 SW-22-5-0S 8 SW-2-5-0S 50 000 95 AW-02-5-S 20 SW-22-5-S SW-2-5-S 00 500 0 AW-02-5-2S 0 SW-22-5-2S 52.5 SW-2-5-2S 00 2500 20 AW-02-5-S 0 SW-22-5-S 90 SW-2-5-S 500 5000 900 AW-02-5-5S 200 SW-22-5-5S 00 SW-2-5-5S 800 8000 500 AW-02-5-S 500 SW-22-5-S 0 Hg Vac 5 0 AW-04-5-2E.5 SW-24-5-2E 5.25 SW-4-5-2E 5 5 8 AW-04-5-2E 4 SW-24-5-2E SW-4-5-2E 0 00 0 AW-04-5-E.5 SW-24-5-E 5.25 SW-4-5-E 0 50 AW-04-5-24E 4 SW-24-5-24E.5 SW-4-5-24E 0 00 28 AW-04-5-9E 8 SW-24-5-9E 2 SW-4-5-9E 0 400 52 AW-04-5-2E 0 SW-24-5-2E 8 SW-4-5-2E 5 800 20 AW-04-5-22E 25 SW-24-5-22E.5 SW-4-5-22E 00 000 90 AW-04-5-E 5 SW-24-5-E 52.5 SW-4-5-E 200-2500 400 AW-04-5-E 5 SW-24-5-E 2.5 SW-4-5-E 2 wyer Instruments, Inc. P.O. Box /Michigan City, Indiana 4/Phone 29 89-8000/Fax 29 82-905 U.K. Phone (+44) (0)494-40 Australia Phone 2 422-2055
General Purpose Types A, S, R, L rawing No. 000B HOLES FOR FLANGE SCREWS /2 CONUIT 5-/4 IA. A22 A2 A42 A2 A A4 -/2 Bourdon Tube es Control imensions & Enclosures -/8 [«\«Weatherproof Types AW, SW, RW rawing No. 02 IA. REAR FLANGE MOUNTING HOLES () [\««S GASKETE COVER 2-/ /2 CONUIT HUB Explosion-Proof Types AH, RH, SH rawing No. 50 -/2 BREATHER (OPTIONAL) 9-/8 -/4 MOUNTING HOLES (OPTIONAL) /2 IA. /2 NPT 5 /4 CONUIT Flow iaphragm Seal Types MSAG rawing No. 205 Flange for Surface Mounting rawing No. 000F PN -20 (2) A24 A4 A44 Explosion-Proof Types AE, RE, SE rawing No. 98 0-/ IA. -5/8-9/ -/2 IA. BACK CONUIT S 0-/ 9-/8 2-5/ 4 IA. FLUSHING PROCESS /4, /2,, -/2 NPT /4 IA. A2 A A4 BOTTOM /8 MOUNTING HOLES (4) (.) /2 NPT Connection for ranges 5S, S (2.) Use PN - for ranges 5S, S General Purpose NEMA Enclosure For indoor use and other general purpose applications under normal atmospheric conditions. Provides protection against dust and light splashing. Heavy gauge plain steel case. Flanged case available. Transparent cover for visible on-off operation. Locking device prevents tampering. connection,. Electrical connection back of case for /2 conduit or BX. Shipping wt. 4 lbs. See above for dimensions. Furnished as standard unless otherwise specified. Watertight, ust-tight/ Type W NEMA S, 4, & 4X Enclosure For outdoor or indoor applications. Complies with hose test and requirements for watertight, dust-tight, drip-tight weatherproof, weather-resistant, splash-proof, sleet-proof, and moisture-resistant. Flanged, heavy gauge steel case with transparent cover for visible on-off operation. External adjustments protected by cover. Bottom pressure connection.. Electrical connection back of case for /2 conduit, removable /2 hub. Shipping wt. lbs. See above for dimensions. Optional, add W to prefix, i.e. AW, RW, SW, when ordering. Explosion- Proof Type H Hazardous Area Enclosure suitable for Class I, Groups C &, Class II, Groups E, F & G; NEMA & 9 applications. Control mechanism is an integral part of enclosure and cannot be replaced in the field. For surface, panel or pipe mounting. Aluminum case with glass window in cover for visible on-off operation. Bottom pressure connection, /2 male NPT /4 female NPT. External adjustments. Available with breather and drain. Shipping wt. 8 lbs. (. kg.). See above for dimensions. Optional housing, to order add H to prefix. Example: AH, RH, or SH. Not available on 80. NOTE: Standard general purpose NEMA and NEMA 4 enclosures are suitable for Class I, ivision 2 applications with addition of conduit hub (mercury switch models only). wyer Instruments, Inc. P.O. Box /Michigan City, Indiana 4/Phone 29 89-8000/Fax 29 82-905 U.K. Phone (+44) (0)494-40 Australia Phone 2 422-2055
Options and Accessories Mounting Flange For Surface Mounting (Field Installation) For A, AF, S, SF, R, RF and L controls only. May be ordered separately for field installation. Part No. -2 (except on 5S, S) Part No. - (for range 5S, S only) Mounting Bracket Breathers & rains STANAR BREATHER STANAR RAIN For Class I, Groups C, and Class II, Groups E, F, G (water only). Mercoid S.S. drains are flame-tight, but not watertight which permits water to escape continuously. Mercoid S.S. breathers include a water shedding cap and provide effective case ventilation. For AH, AHF, RH, RHF, SH, SHF. Part No. 42-24 Standard drain. Part No. 42-2 Standard breather. For AE, RE. Part No. 42-25 rain with /4 connection. *Part No. 42-2 Standard breather with /2 connection. *Part No. 42-29 Reducer (/4 to /2 ) for breather. *Breather and reducer must be ordered together. Miscellaneous Oxygen & Acetylene Service Spec. 2444 Fungus Proof Spec. 220 FM Approval AF, RF, SF Factory Mutual Approved es For use with standard NEMA enclosure general purpose controls only: A, AF, S, SF, R, RF, L. Note: not adaptable for Range 5S and S. Part No. -25 Conduit Hub For /2 rigid conduit. Mercury switch type controls with standard general purpose NEMA- or optional weather-resistant NEMA- or NEMA-4 enclosures are suitable for Class, iv. 2 applications when ordered with this hub. Available for A. Part No. 42-4 Remote Connections Pigtail Siphon ELRIN Bushed Movement B *Registered Trademark of E.I. upont de Nemours & Co. PIVOT POINT BEARINGS, TOP & BOTTOM, BUSHE WITH ELRIN SWITCH CARRIER STOP POST SLEEVE WITH ELRIN ELRIN PIN Cover Over External Adjustments ELRIN PIN BAR LINK ELRIN BRUSHE PIVOTAL EN BEARING & BAR PIN OF ELRIN Part No. 49-2HP ft. copper remote connection, 2500 psig max. Part No. 49-20 2 ft. s.s. connection with 0 s.s. fittings, 000 psig max. Recommended for steam applications 5 psig or higher. For -0, -50, -20, -00, -20 pressure controls. Please specify. Part No. 42-58 2000 psig max. Provides longer service life for pressure and temperature controls. Vibration and pulsation are the prime causes of control wear. Almost all types of vibration will have some effect on the life and continued accuracy of controls. To offset the wearing of metal surfaces found in bearings and pivot points, the control mechanism is designed to incorporate elrin bushed movements at each possible wear point. Also for environments where corrosion may be a factor. Add Letter B After Type and Suffix Nos. Example: S-22-2B, A--B, AH-4-B. 4 wyer Instruments, Inc. P.O. Box /Michigan City, Indiana 4/Phone 29 89-8000/Fax 29 82-905 U.K. Phone (+44) (0)494-40 Australia Phone 2 422-2055
-900 FEATURES Protects to 2,500 psig Available to 5,000 psig External adjustment Adjustable or fixed deadband Integral over-pressure seal diaphragm Operates in ambient temperatures 0 to +40 F. Available with mercury or snap switch. Bourdon Tube es Over- iaphragm Controls OPERATING RANGES Brass Bourdon Tube, with Mercury RANGE NO. MIN. EABAN FIXE EABAN Adjustable Operating Range A-9 A-95 S-92 0 Hg. Vac. 2 PSIG*.5 0.5 oz. -4.5 0.5 oz. 4-5.5.5 oz. *Operation not recommended for processes that do not go below 0 PSIG. Bourdon Tube, with Mercury RANGE NO. MIN. EABAN FIXE EABAN Adjustable Operating Range A-92 A-952 S-922 5S 2-0 4 2 oz. S 5-00 2 oz. 8S 0-200 8 4 2 oz. 9S 20-00 4 psig 0S 50-00 50 25 2.5 psig S 5-000 5 40 0 psig 2S 00-500 00 50 2 psig S 00-2500 50 00 45 psig NOTES: Above controls must have seal attached A-9 = Indicates slugged bourdon tube APPLICATION For low pressure setpoints in a system where normal pressures may rise to 5,000 psig. An over-pressure seal protects the control beyond a predetermined pressure. When that pressure is exceeded, the diaphragm seats and no further motion is transmitted. Type MSAG/MSAH TYPE MSAG MSAH XTBX SEAL WITH TYPE A PRESSURE CONTROL Type MSAG (PLAIN) Type MSAH (CLEAN-OUT) MATERIAL EXPOSE SURFACES or SS or SS Teflon and PVC Bourdon Tube es Pipe-Mounted iaphragm Seals FEATURES Maximum seal design pressure is 2500 psig for MSAG and MSAH, 00 psig XTBX. Seals can be filled after installation via Bleed Screw () in diagram at right. Thin, flexible diaphragm (2) is actuated by system pressure. iaphragm transmits system pressure to seal s liquid fill () to operate the Bourdon tube of the protected control which attaches at (). Chemical corrosion or other damage to seal from system s pressure medium can be prevented by proper selection of materials for the diaphragm, (2) bottom bowl (8) and other surfaces which the pressure medium will contact. APPLICATION Mercoid diaphragm seals prevent corrosive, viscous or other damaging pressure media (gas, liquid, etc.) from entering the pressure power element (Bourdon tube) in pressure or differential pressure controls. Plain seals cannot be fielddisassembled for cleaning or other purposes. Mercoid clean-out type diaphgram seals can be field-disassembled for cleaning or other purposes. Top bowl (Key #4 in diagram at right) with both clean-out ring (9) and control attached can be removed while bottom bowl (8) is still connected to system. However, system must be shut down beforehand. Seals cannot be used below 0 Hg vacuum. To Order Seals Plain or Clean-Out Types When ordering, specify all of the following: Type and pressure range of control which seal is to protect. iaphragm seal type desired. iaphragm material stainless steel, Teflon -coated stainless steel, or Tantalum. medium-to-seal contact surfaces material-rustresistant finish or stainless steel. Size of seal-to-system connection /4, /2,, or 2 NPT. Temperature range of pressure medium. Ambient temperatures. TYPE MSAG (PLAIN) 4 2 5 8 4 4 2 wyer Instruments, Inc. P.O. Box /Michigan City, Indiana 4/Phone 29 89-8000/Fax 29 82-905 U.K. Phone (+44) (0)494-40 Australia Phone 2 422-2055 5 TYPE MSAH (CLEAN-OUT) 9 2-5/ -/8 5 8 4 Control Connection 2 iaphragm: SS, Teflon -Coated SS or Tantalum Liquid Fill 4Top Bowl, rust-resistant finish 5 Seal-to-System Connection Flushing Connection () and Removable Plug Bleed Screw 8 Bottom Bowl, rust-resistant finish steel or SS 9 Clean-Out Ring Mercoid diaphragm seals are not available for Range 5S & S Mercoid Controls NOTE: Controls and gauges with diaphragm seals can be affected by ambient and system temperature changes, particularly at low pressures. For these conditions, Mercoid Controls can be furnished with ambient temperature compensation (available only when control is mounted on seal). Write for details. Most seals can be furnished with a remote copper or S.S. tubing connection between seal and control. A mounting bracket (No. -25) may be used for remote mounted controls. Specify if remote connection is desired.