E.L. Power - Palmer Instruments

Quality and Reliability are the most important "products" at Palmer. For example, Palmer's All Stainless Steel Gauges are loaded with standard features that are either not available from other companies, or are options available at an increased price. Our Gauges are guaranteed for Two Years on Fluid Filled Gauges, and One Year on Dry Gauges.

Palmer Gauges include:

Socket welded to case to prevent a wet gauge from developing a leak, and protects the integrity of the unit.
High-low stops to keep sector on gear during pressure surges or discharges.
Removable Restrictor to protect from dynamic pressure.
1/2% Accuracy on Dry Gauges.

Palmer Instruments strives to obtain unparalleled Quality and Service for our customers - and at the right price!

All Stainless Steel Gauges
Case:	AISI 304 Stainless Steel in 2" (50mm), 2-1/2" (63mm), 4" (100mm) and 6" (150mm) sizes, Filled or Dry. Case and socket welded together on 4" and 6" gauges.
Ring:	AISI 304 Polished Stainless Steel, Bayonet Connection on 4" and 6" gauges. Crimped on 2" and 2-1/2" gauges.
Window:	Plexiglas on 2", 2-1/2", 4" and 6". Safety glass optional.
Socket:	AISI 316 Stainless Steel, TIG welded to the elastic element using 316 Stainless Steel. K Monel optional. 4" and 6" gauges come with removable Stainless Steel Restrictor. 2.5" gauges come with pushed on Stainless Steel Restrictor.
Bourdon Tube:	All Pressure Sensing Elements are made from AISI 316L Stainless Steel. All 2" gauges, 2-1/2" gauges less than 600 PSI, 4" and 6" gauges less than 1000 PSI range use a C-tube configuration. All other gauges use a spiral tube. K Monel optional.
Movement:	Stainless Steel, Reinforced Stainless in 4" and 6" gauges. Built in mechanical stops prevent damage from inadvertent over-range or under- range on 4" and 6" gauges.
Pointer:	Balanced black aluminum. Micrometer adjustable in 4" and 6" only.
Dial:	White aluminum with black markings. Markings and graduations in accordance with ASME B40.1-1991.
Process Fluid Temp.:	750 deg. F (400 deg. C) maximum for standard tube and socket materials, 450 deg. F (230 deg. C) maximum for optional K Monel.
Overpressure Limit:	As a percent of full scale value: 30% for ranges up to 870 PSI (60 Bar), 25% for ranges from 870 to 1400 PSI (100 Bar), 15% for ranges above 1400 PSI (100 Bar). Overpressures in excess of these values may affect calibration, but will not damage movement due to mechanical stops.
Temperature Errors:	For a normal temperature of 68 deg. F (20 deg. C) approximately +0.3% error for a temperature increase of 18 deg. F and - 0.3% error for a temperature decrease of 18 deg. F (10 deg. C).
Range:	Consult your Distributor or Palmer for PSI, Metric, and Dual Scale range availability. K Monel option is not available for ranges above 4000 PSI (250 Bar).
Solid Front Process Gauges
Case:	AISI 304 Stainless Steel in 4"(100mm), Black Phenolic in 4-1/2" (125mm). 4" available either Filled or Dry, 4-1/2" Phenolic Case Back Connected - Dry Only.
Ring:	AISI 304 Polished Stainless Steel with Bayonet Connection in 4", Threaded Reinforced Polybutilene in 4-1/2".
Window:	Safety glass in 4", Plexiglas in 4-1/2". (Safety Glass optional).
Socket:	AISI 316 Stainless Steel, TIG welded to the elastic element using 316 Stainless Steel. Optional K Monel.
Bourdon Tube:	All Pressure Sensing Elements are made from AISI 316L Stainless Steel. C-tube configuration is used for ranges below 1000 PSI. Spiral tube configuration for higher ranges. Optional K Monel.
Connection:	All Process Gauges come with 1/2" NPT threads with built in Stainless Steel Restrictor.
Movement:	Reinforced Stainless Steel with Internal Stops to prevent damage in the event of inadvertent over-range and under-range.
Pointer:	Balanced black aluminum, Micrometer adjustable.
Dial:	White aluminum with black markings. Markings and graduations in accordance with ASME B40.1-1991.
Process Fluid Temp.:	750 deg. F (400 deg. C) maximum for standard tube and socket materials, 450 deg. F (230 deg. C) maximum for optional K Monel.
Overpressure Limit:	As a percent of full scale value: 30% for ranges up to 870 PSI (60 Bar), 25% for ranges from 870 to 1400 PSI (100 Bar), 15% for ranges above 1400 PSI (100 Bar). Overpressures in excess of these values may result in a calibration shift but will not damage the movement due to the built in stops.
Temperature Errors:	For a normal temperature of 68 deg. F (20 deg. C) approximately +0.3% (+0.4% for 4 1/2 inch) error for a temperature increase of 18 deg. F and -0.3% (+0.4% for 4-1/2") error for a temperature decrease of 18 deg. F (10 deg. C).
Safety Feature:	Palmer Process Gauges are designed to provide the maximum safety for personnel monitoring the gauges in the event of gauge failure. These gauges are constructed with a solid barrier between the sensing element and the dial front. In addition to protecting the user from fluid and particles in the event of failure, the back of these cases is designed to blow out to release the pressure inside the case.
Range:	Consult your Distributor or Palmer for PSI, Metric, and Dual Scale range availability K Monel option is not available for ranges above 3000 PSI (250 Bar).
Phenolic Case Blow-Out Vent Gauges
Case:	Black Phenolic with Safety Blow Out Vent. Available either Filled or Dry.
Ring:	Threaded reinforced polypropylene.
Window:	Glass, Plexiglas on Filled gauges. Safety glass optional.
Socket:	OT 58 Brass. Built in, Brass Restrictor.
Bourdon Tube:	Copper Alloy for ranges up to 600 PSI, 316L Stainless Steel for ranges above 600 PSI.
Connection:	1/2" NPT Threads. 1/4" NPT optional.
Movement:	Brass gears with Stainless Steel Plates.
Pointer:	Black aluminum, micrometer adjustable
Dial:	White aluminum with black markings.
Accuracy:	1.6% of full scale, 1% of full scale optional.
Range:	Consult your Distributor or Palmer.
Low Pressure Gauges
Case:	AISI 304 Stainless Steel in 4"(100mm) and 6"(150mm). Chrome plated steel in 2-1/2".
Ring:	AISI 304 Polished SS with Bayonet Connections on 4" and 6". Chrome Plated Steel with Bayonet Connections on 2-1/2".
Window:	Glass, optional Safety Glass on 4" and 6" gauges.
Socket:	Brass on models 25CP and 40SP, AISI 316 Stainless Steel on models 40SC and 60SC.
Pressure Sensing Element:	Capsule sealed with O-ring gasket. Phosphor Bronze on models 25CP (Brass for ranges less than 60 inches of water), and 40SP, AISI 316 Stainless Steel on models 40SC and 60SC.
Accuracy:	1.6% of full scale.
Range:	Consult your Distributor or Palmer.
Movement:	Brass, high sensitivity type.
Pointer:	Black aluminum Micrometer adjustment on 4" and 6" models.
Dial:	White aluminum with black markings.
Overpressure Limit:	Overpressure is not permitted on gauges with Phosphor Bronze elastic elements. Overpressure on gauges with Stainless Steel elastic elements is limited to 15% of full scale.
Temperature Errors:	For an increase of 18 deg. F (10 deg. C) from the calibration temperature of 68 deg. F an additional +0.4% error can be expected, for a similar decrease in temperature, a -0.4% error will occur; 4" and 6" gauges only.
Operating Limitations:	The maximum operating pressure should not exceed approximately 75% of the full scale range.
Options:	Consult your Distributor or Palmer.
Gas Test Kit:	Is available which consists of an appropriate gauge with a 3 foot buna-s hose assembled to the gauge and mounted in a rugged carrying case. Consult your Distributor or Palmer for details.
2-1/2" Brass Case Gauges
Case:	2-1/2" (63mm) one piece die cast Brass Case and Socket, Glycerine Filled. Optional Chrome Plated Steel Front Flange on Stem Mount, Back Connected Gauges.
Ring:	Highly Polished Brass.
Window:	Polycarbonate.
Bourdon Tube:	Phosphorus Bronze for gauges with ranges up to 8000 PSI, AISI 316L Stainless Steel above 8000 PSI. C-tube configuration is used below 900 PSI, spiral tube for higher ranges.
Accuracy:	1.5% of full scale.
Range:	Consult your Distributor or Palmer.
Connection:	1/4" NPT with 17mm wrench flats cast into Stem Mount, Lower Connected, 14mm wrench flats cast into Stem Mount, Back Connected.
Movement:	All Brass Gear and Plates.
Pointer:	Balanced black aluminum, not adjustable.
Dial:	White with black markings. Marks and figure intervals as specified in table.
Options:	Chrome Plated Steel Front Flange, Chrome Narrow bezel with U- Clamp.
Stainless Steel Case Gauges
Case:	AISI 304 Stainless Steel. 2" (50mm), 2-1/2" (63mm), and 4" (100mm). Available either Filled or Dry.
Ring:	AISI 304 Polished Stainless Steel, Crimped onto case.
Window:	Plexiglas
Socket:	OT 58 Brass.
Bourdon Tube:	Phosphor Bronze C-Tube for ranges to 500 PSI. Spiral Tube for ranges from 600 to 5000 PSI. Spiral Tube of 316L Stainless Steel for ranges above 6000 PSI.
Accuracy:	1.6% of full scale on 2" and 2-1/2", 1 % of full scale on 4" gauges.
Range:	Consult your Distributor or Palmer.
Movement:	OT59 Brass Gears with 304 Stainless Steel plates.
Pointer:	Black anodized aluminum.
Dial:	White aluminum with black markings.
Electrical Contact Gauges
Case:	AISI 304 Stainless Steel in 4" (100mm). Available in Dry or Filled with Polyisobutilene (Optional). Available in Stem Mount Lower Connected, or Back Connected.
Ring:	AISI 304 Polished Stainless Steel, Bayonet Connection.
Window:	Plexiglas
Socket:	AISI 316 Stainless Steel.
Bourdon Tube:	AISI 316L Stainless Steel. Ranges less than 1000 PSI(60 Bar) a C-tube is used, higher ranges, a spiral tube.
Connection:	1/2" NPT, 1/4" NPT available.
Accuracy:	1.0% of full scale value (ASME grade 1A) on Dry gauge, 1.6% on filled models.
Movement:	Reinforced Stainless Steel.
Pointer:	Balanced black aluminum.
Dial:	White aluminum with black markings. Markings and graduations in accordance with ASME B40.1-1991.
Ambient Temperature Limits:	-13 deg. F/150 deg. F (-25 deg. C/65 deg. C).
Process Fluid Temperature Limits:	212 deg. F (100 deg. C) maximum.
Temperature Errors:	For a normal temperature of 68 deg. F (20 deg. C) approximately +0.3% error for a temperature increase of 18 deg. F and - 0.3% error for a temperature decrease of 18 deg. F (10 deg. C).
General Characteristics:	Gauges can be supplied with one or two contacts, which are designed to either open or close as the pressure gauge pointer passes the set point. Contacts are made from a silver alloy and feature a magnetic block to avoid sparking or faulty switching in high vibration environments.
Electrical Ratings:	The contacts can be used with either AC or DC with a maximum voltage of 380 volts and are rated at 30 Watts/50 VA.
Switching Combinations:	Contact your Distributor or Palmer for information.
Current Loop Transmitter Gauges
Case:	AISI 304 Stainless Steel in 4" (100mm). Available Filled or Dry.
Ring:	AISI 304 Polished Stainless Steel, Bayonet Connection.
Window:	Safety glass.
Socket:	AISI 316 Stainless Steel.
Pressure Sensors:	Bourdon tube is made from AISI 316L Stainless Steel. Electronic sensor is thick film on ceramic, seal is PTFE (Teflon(R)). Sensors are completely independent of one another giving the instrument a built in back up and calibration check capability.
Connection:	1/2" NPT, 1/4" optional. Stem Mount, Lower Connected only.
Accuracy:	0.5% of full scale value (ASME grade 2A) on dry gauges, 1.0% (ASME grade 1A) on silicone filled.
Movement:	Reinforced Stainless Steel.
Pointer:	Balanced black aluminum, micrometer adjustable.
Dial:	White aluminum with black markings. Markings and graduations in accordance with ASME B40.1-1991.
Temperature Limits:	-4 deg. F/150 deg. F for Filled gauge (ambient and process fluids).
Over Pressure Limits:	As a percent of full scale value: 30% for ranges up to 870 PSI (60 Bar), 25% for ranges from 870 to 1400 PSI (100 Bar), 15% for ranges above 1400 PSI (100 Bar).
Temperature Errors:	For a normal temperature of 68 deg. F (20 deg. C) approximately +0.3% error for a temperature increase of 18 deg. F and - 0.3% error for a temperature decrease of 18 deg. F (10 deg. C).
Output Signal:	Industry standard 4 to 20 mA current loop.
Power Supply:	18 to 32 volts, 25 mA.
Accuracy:	0.5% of full scale value including linearity and hysteresis.
Operating Temperature Range:	-13 deg. F to 160 deg. F (-25 deg. C to 85 deg. C).
Compensated Temperature Range:	14 deg. F to 104 deg. F (-10 deg. C to 40 deg. C).
Temperature Effect on Zero Balance:	Less than 0.02% of (0.03% OC) in the compensated range.
Temperature Effect on Output:	Less than 0.006% of (0.01% OC) in the compensated range.
Long Term Stability:	Typically less than 0.01%/year.
Test Gauges
Case:	AISI 304 Stainless Steel, 6" (150mm) diameter. Case features a Solid Front construction with Blowout Back for safety.
Ring:	AISI 304 Polished Stainless Steel with Bayonet Connection.
Window:	Glass
Socket:	AISI 316 Stainless Steel, welded to Bourdon tube using a silver alloy fill.
Bourdon Tube:	All Pressure Sensing Elements are made from Beryllium Copper. C-tube configuration is used for ranges below 1000 PSI (60 Bar), spiral tube configuration for higher ranges.
Connection:	1/2" NPT connection standard, 1/4" NPT optional. BSP threads also available in place of 1/2" NPT. 24mm wrench flats used on the Stem Mount, Lower Connected gauge, 17mm flats on the Stem Mount, Back Connected gauges.
Accuracy:	Accurate to 0.25% of full scale value (ASME grade 3A) at 68 deg. F (20 deg. C), in vertical position.
Movement:	High precision geared movement.
Pointer:	Balanced, knife-edge, black pointer featuring micrometer adjustment.
Dial:	Anti-parallax mirror dial constructed of aluminum. Finish is a light green for easy reading with black markings.
Temperature Errors:	For an increase of 18 deg. F (20 deg. C) from the calibration temperature an additional +0.05% error can be expected, for a similar decrease in temperature, a -0.05% error will occur.
Operating Limitations:	Operation should be restricted to 75% of full scale value.
Options:	Certification tracing the accuracy and calibration to NIST is available. Gauge may also be ordered with a fabric carrying case.
Painted Steel Case Utility Gauges
Case:	Black Painted Steel, available in 1-1/2" (40mm), 2" (50mm), 2-1/2" (63mm), and 4" (100mm).
Window:	Plastic on all models.
Socket:	Brass
Bourdon Tube:	Brass - C tube
Connection:	1/8" NPT on 1-1/2" gauge, 1/4" NPT on 2", 2-1/2" and 4" gauges. The 4" gauge available in Stem Mount, Lower Connected only, all other gauges available in either Stem Mount, Lower Connected or Stem Mount, Back Connected.
Accuracy:	2-1/2" gauges are +/-2% mid-range. 4" gauges are +/-1.5% mid- range.
Movement:	Low friction, durable Brass
Pointer:	Black painted aluminum, nonadjustable.
Dial:	White background with black graduations and lettering.
Range:	Consult your Distributor or Palmer.
Stainless Case Contractor Gauges
Case:	300 Series Stainless Steel Case and Bezel Ring. Available only in 4-1/2" (125 mm).
Window:	All models use a plastic window.
Socket:	Brass
Bourdon Tube:	Brass
Connection:	1/4" NPT standard.
Mounting:	Stem Mount, Lower Connected only.
Accuracy:	+/-1 % mid-range.
Movement:	Brass
Pointer:	Black painted aluminum, zero adjustable from face of dial.
Dial:	White finished aluminum with black graduations and lettering.
Range:	Gauge is available in PSI only Consult your Distributor or Palmer.

Piston Type Snubbers

All products from Palmer Instruments are constructed of the finest materials and designed for reliable service in severe environments. However, some applications occasionally arise where additional protection is needed. Where rapid pulsations or hydraulic hammering is likely to be encountered, a Snubber is recommended to protect the pressure gauge.

Palmer Piston Type Snubbers resist clogging and are self cleaning. During rapid fluid flow the floating piston is forced up against the orifice, choking the flow and protecting the gauge. By changing the diameter of the piston, the system can be "tuned" to your specific working fluid. The Snubber comes with five different piston which are easily changed in the field. Call factory for piston recommendations.

Steam Siphons

Also called "pigtail" siphons should be given serious consideration whenever steam pressure measurement is required. By filling the coil with water, a protective barrier is formed between the high temperature steam and the instrument. Contact your Distributor or Palmer for pressure rating and construction materials for Palmer Steam Siphons.

Needle Valves

Palmer Instruments is proud to offer the full line of Balon Needle Valves. Balon Valves come in a standard steel model and a stainless steel for severe environments. Balon Needle Valves offer special features, such as a plastic stem protector to keep out contamination, a stainless steel bonnet shroud for security, 316 stainless stem with rolled threads for smooth action and long life, and an exclusive two piece design for soft seats which resist abuse and compensate for wear. Locking lugs prohibit seat rotation.

Needle Valves
Bonnet:	Sealed with O-ring above non-tapered threads and locked in place with a Stainless Steel Shroud to prevent loosening.
Stem:	Constructed of AISI 316 Stainless Steel and featuring rolled threads for smoother action and long life. Stem is sealed below the threaded area with an O-ring and backup seal. Top of stem is protected by a plastic cap to keep out contamination and provide a visual indication of stem travel.
Seat:	Available in either a hard (metallic) seat for pressures to 10,000 PSI, or soft seat for reliable seal at pressures below 6000 PSI. Both seats feature a 100 taper to provide finer adjustments of flow. The soft seat is replaceable.
Connection:	Valves are available with 1/4" or 1/2" NPT connections in either male or female.
Operating Limits:	Maximum operating temperature 200 deg. F (93 deg. C).