Saturday, February 19, 2011
DtiCorp.com Is Introducing 3 Honeywell P7810 Electronic Pressure Controls
Fort Lauderdale, FL – Popular Honeywell online retailer DtiCorp.com (http://www.DtiCorp.com) is introducing 3 Brand New Honeywell P7810 Electronic Pressure Controls. Honeywell line voltage pressure controller that provides automatic operating control, automatic limit protection, manual reset limit protection, and 4-20ma modulating firing rate control for pressure systems up to 300 psi. Install the P7810 PressureTrol Controller above the boiler water line when used with steam boilers. Connect the siphon loop (part number 209731A or equivalent) between the P7810 Controller and the boiler to prevent scale and corrosive vapors from attacking the controller sensor element. Mount the P7810 Controller next to the pressure gauge in the manufacturer-provided fitting on the boiler. Mount at a remote location to avoid excessive vibration, or mount in a special mounting on a low water cutoff.
The P7810 uses integral electronic pressure sensors to sense pressure at the inlet through an internal manifold. The control sensor connects to the internal manifold with 1/4 inch NPT threads and provides the pressure signal to control a relay for the on/off control function. The same sensor provides the information for the 4 to 20 mA firing rate modulation output.
A separate integral electronic pressure sensor is required to provide the high limit function. This sensor also connects to the internal manifold with 1/4 inch NPT threads P7810 devices contain two internal sensors and require a 1/2 inch NPT mounting to the steam pressure header. Devices with high limits lock out at setpoint and require manual reset when pressure returns below the setpoint. Devices will not reset with power interruption.
Features:
- May be used with steam, air, non-combustible gases or fluids that will not corrode the pressure sensing element.
- Models available in 15, 150, 300 psi maximum set points.
- LED indicators show limit function/lockout.
- Reset function easily accessible under cover.
- Light Emitting Diode (LED) indicators show power, call for heat function and lockout status.
- Electronic maximum fixed stop limit.
- Clear cover allows set point and differentials to be read (but not adjusted) without opening the cover.
Specifications:
- PressureTrol Controller with On/Off control, modulate and safety high limit.
- Power Input: 120 Vac (+10% /-15%), 50/60 Hz (±10%).
- Output Impedance: 300 ohm maximum.
- Sensor Material: 304 stainless steel.
- Pressure Connector: 1/2 in. NPT.
- Case Material: Plastic.
- Electrical Terminations: Screw terminals.
- Accuracy: ±4.0 percent full scale output operating range, over operating temperature.
- Operating Temperature Range: 32°F to 140°F (0°C to 60°C).
- Storage Temperature Range: -20°F to +150°F (-29°C to +66°C).
- Humidity: 5% to 95% relative humidity, noncondensing.
- Vibration: 0.5G continuous maximum vibration.
- Make all pipe connections in accordance with applicable local standards. Use parallel jaw wrench to tighten P7810 Controller hexagonal fitting to avoid leaks and damage to the case.
- All wiring must comply with applicable electrical codes, ordinances and regulations. Use NEC Class 1 line voltage wiring.
- For nominal installation, use moisture-resistant No. 14 wire (maximum size allowed) suitable for at least 167°F (75°C) or 194°F (90°C) for Flame Safeguard Primary Controls.
- Use shielded wire for 4 to 20 mA modulating output and terminate the shield to earth ground. Do not run these wires in the same conduit as high voltage ignition wires.
- All P7810 PressureTrol Controllers have terminal screws and 27/32 in. (22 mm) holes in both sides for conduit, cables and wiring. Remove the top cover by loosening the screw at the top of the P7810 Controller case.
- Follow the burner or boiler manufacturer wiring diagram, if provided. Make sure the loads do not exceed the contact ratings in the Specifications section.
- Approvals:
- Underwriters Laboratories Inc.: Listed; MP446-30-1.
- Canadian Standards Association Certified; 158158-1355621.
- Factory Mutual Approved: Approved; 3018936.
- CSD-1 AFB (Control Safety Devices, Automatic Fired Boilers): Acceptable.
- FCC Class B, computing devices, part 15.
Models available:
1. P7810C1000 Solid State Pressuretrol Controllers, On-off, Modulate and Limit Control, 0 psi to 15 psi
2. P7810C1018 Solid State Pressuretrol Controllers, On-off, Modulate and Limit Control, 0 psi to 150 psi
3. P7810C1026 Solid State Pressuretrol Controllers, On-off, Modulate and Limit Control, 0 psi to 300 psi
About Us: DtiCorp.Com (http://www.DtiCorp.com) carries more than 35,000 HVAC products, including industrial, commercial and residential parts and equipment from Honeywell, Johnson Contols, Robertshaw, Jandy, Grundfos, Armstrong and more. Our online catalog is easy to navigate and search, and all products have a picture and a description. If a customer has any questions about a product, they can call 800-757-5999 and speak with one of our product experts. Our mission is to offer the best prices anywhere to our customers.
Julian Arhire
Manager DtiCorp.com
Phone: 954.484.2929
Fax: 954.206.0767
Web: http://www.DtiCorp.com
Saturday, February 5, 2011
7 New Honeywell VP531 Pneumatic Valves From DtiCorp.com
Fort Lauderdale, FL – Popular Honeywell online retailer DtiCorp.com (http://www.DtiCorp.com) is introducing 7 brand new Honeywell VP531 Pneumatic Valves. The VP531A,C Terminal Unit Valves are normally-open, single-seated valves that provide proportional control of steam or hot/cold water in terminal units. These valves are available with threaded NPT or soldered end connections. The VP531A is intended for control of water at a maximum of 180°F (82°C). The VP531C is intended for water or steam at a maximum of 240°F (116°C).
The valve should be installed so the stem is anywhere between upright and horizontal. The actuator cannot be lower than the body. The direction of flow must be in the same direction as the arrow on the valve body. Be sure to allow enough clearance around the actuator top for servicing the valve after installation.
Series 2 VP531C Valves are built with a green (2-5 psi) actuator spring. Shipped with the valve is a loose orange (3-10 psi) spring. If desired, replace the green spring with the orange. To make this change remove the cover fastener. Before using the orange spring, make sure it can provide adequate close off for the application.
Connecting the valve without removing the internal assembly can overheat and damage the plug and packing beyond repair. Remove the top and insert assembly before connecting the VP531 soldered body valve. The valve is shipped with a loose bonnet nut allowing easy removal of the top and insert assembly. Lift the assembly out before soldering the valve into place. When soldering is completed, replace the top and insert assembly and tighten the bonnet nut firmly enough to compress the copper washer seal (35 to 45 ft-lb torque).
Features:
- Available in several capacities and spring ranges for various application requirements.
- Easily replaceable actuator assembly for convenience of service.
- Compact size for use inside most unit enclosures.
Specifications:
- Dimensions Pipe centerline to top of actuator: 3 1/2 in. Face-to-face: 2 9/32 in.
- Body: Cast bronze.
- Body Pattern: Two-way
- Disc and plug:
- VP531A: Rubber.
- VP531C: Teflon and brass.
- Seat: Bronze; integral with body.
- Stem: Stainless steel, 3/16 in. (5 mm) diameter.
- Bonnet nut seal: Reusable copper ring.
- Valve Action: Proportional Normally Open
- Packing:
- VP531A: Rubber, spring-loaded, self-adjusting.
- VP531C: Teflon, spring-loaded, self-adjusting.
- Controlled Medium Temperature (maximum):
- VP531A: 180°F (82°C).
- VP531C: 240°F (116°C).
- Allowable difference for alternating hot and cold water: 140°F (78K).
- Maximum Pressure Differential for Quiet Service and Normal Life of Disc and Seat:
- Water: 20 psi (138 kPa).
- Steam (VP531C only): 10 psi (69 kPa).
- Air Connection: Integral, for 1/4 in. (6 mm) O.D. plastic tubing.
- Maximum Safe Air Pressure: 30 psi (207 kPa).
- Maximum Safe Diaphragm Temperature: 230°F (110°C).
- Close-off Ratings at Branch Line Pressure: 70 psid at 20 psi (with 2 to 5 psi spring)
- Actuator: Rolling diaphragm type.
- Flow Characteristics: Modified equal percentage.
- Body Pressure Rating (maximum): 150 psi (1034 kPa).
Models Available:
1. VP531C1000 Two-way, Unitary, 1/2 in (12.7 mm), 1.6 Cv, Steam or Water
2. VP531C1018 Two-way, Unitary, 3/4 in (19.1 mm), 2.6 Cv, Steam or Water
3. VP531C1026 Two-way, Unitary, 3/4 in (19.1 mm), 3.3 Cv, Steam or Water
4. VP531C1034 Two-way, Unitary, O.D.: 5/8 in. (15.9 mm); Nominal: 1/2 in. (12.7 mm), 1.6 Cv, Steam or Water
5. VP531C1042 Two-way, Unitary, O.D.: 7/8 in. (22.2 mm); Nominal: 3/4 in. (19.1 mm), 2.6 Cv, Steam or Water
6. VP531C1059 Two-way, Unitary, O.D.: 7/8 in. (22.2 mm); Nominal: 3/4 in. (19.1 mm), 3.3 Cv, Steam or Water
7. VP531C1067 Two-way, Unitary, 1/2 in (12.7 mm), 2.3Cv, Steam or Water
About Us: DtiCorp.Com (http://www.DtiCorp.com) carries more than 35,000 HVAC products, including industrial, commercial and residential parts and equipment from Honeywell, Johnson Contols, Robertshaw, Jandy, Grundfos, Armstrong and more. Our online catalog is easy to navigate and search, and all products have a picture and a description. If a customer has any questions about a product, they can call 800-757-5999 and speak with one of our product experts. Our mission is to offer the best prices anywhere to our customers.
Julian Arhire
Manager DtiCorp.com
Phone: 954.298.2515
Fax: 954.206.0767
Web: http://www.DtiCorp.com
