3/4mixing valve

Serviceability is another concern with valves or regulators in a steam system. Burling Valve regulators can be rebuilt while the body remains in the piping. All internals of the regulator are accessible from the top. The diaphragm and soft goods are easy to replace. The regulator has several diaphragm configurations available for saturated steam. The most popular is probably our 6 ply PTFE diaphragm but we also offer metal diaphragms where required.

Users of Burling regulators also find that our Cv values are higher than nearly all other regulators on the market today. Higher Cv values mean that a smaller Burling Valve regulator can be used which can further reduce the cost of installation.

Automaticwater temperature mixing Valve

I found that most engineers use complicated control valves to control temperature using saturated steam. They have a thermocouple sending a signal back to a PID controller. The controller is sending a command signal to an electro-pneumatic valve positioner that is controlling how far open and closed the valve needs to be to keep temperature close to the desired range. The consequence of this type of control is the valve must work all the time in an attempt to maintain temperature. Cycling open and closed equates to wear on the valve parts and if one looks at the signal output from the thermocouple, there is a sinusoidal waveform around the targeted temperature, never a smooth, flat signal at temperature.

Thermostaticmixing valve

Not only was temperature more tightly controlled, but they also found that the cost of using a steam regulator was less expensive than when using a valve and all the “trimmings.”

Water temperatureregulator for sink

If temperature has to be adjusted throughout the temperature cycle, like in the first application I mentioned, the Burling Valve (BD series) dome loaded regulator can be teamed up with an electronic pressure regulator from Proportion-Air. The electronic regulator takes the place of the typical I to P (or E to P) transducer and the Proportion-Air pilot device can be calibrated to match whatever pressure is required. A 4-20mA=0 to 250 psig calibrated range is not unusual and neither is 4-20mA=1 to 10 psig. Proportion-Air’s electronic regulator doesn’t require instrument air and only requires a filtration of 40 micron. It also doesn’t constantly bleed air so wasted compressed air is eliminated when using it, and it is a tight shut off device. The electronic regulator doesn’t require regular recalibration like most I to Ps and its repeatability (the measure of achieving the same set point with the same command signal coming from the same direction) is ±0.02% of the full scale calibration.

Building Quality Mixing Valves is what we do at Leonard. At the same time we offer the industries best Service. It starts with the Best Engineers, followed by the most technically knowledgeable Regional Sales Managers, topped off with the industries best Specification Reps.  Our team of experts are easily accessible and have decades of market experience and knowledge on Mixing Valves and Mixing Valve Systems.

If we tightly control the pressure of saturated steam, we will tightly control temperature. Controlling pressure is what a regulator was designed to do and Burling Valve makes very accurate regulators. The first engineers I spoke to about this steam regulator were intrigued. They’d never heard of a steam regulator and this idea just sounded too good to be true. The very first customer I presented this concept to many years ago asked for a trial unit to test performance. We arranged a 30-day trial and the results were praise-worthy. The customer showed me the sine wave of the old system around temperature and showed me the signal output of the thermocouple when using the steam regulator. They were able to carve off 35 minutes of heat up time using our steam regulator and pressure temperature stayed very close to the desired setting with a flat line signal output.

Water Mixing Valve

My training on controlling temperature using saturated steam did not come from a thermal dynamics or other university course. I learned the basic art of temperature control from very wise engineer customers and since I didn’t come with textbook baggage, it was easy for me to think outside the box, to use a cliché. My engineering mentors taught me well and helped me realize that what we offer for temperature control is quite special. A steam regulator can easily replace steam control valves.

Since delivering our first thermostatic mixing valve over 100 years ago, we have focused exclusively on designing and manufacturing the highest quality water temperature control valves in America. At Leonard Valve Company, craftsmanship isn't a lost art – it's something we do every day.

Hot coldMixing Valve

American Society of Sanitary Engineers publishes product standards of safety for plumbing systems.  There are 5 major standards for mixing hot and cold water.  Four of these standards are mentioned specifically in both the IPC and UPC Plumbing codes as well as the four states that use their own codes (California, Illinois, Wisconsin, and New Jersey).  Commercial building require ASSE certified valves. Click below to understand how and when to use these valves. As always, you may contact a Leonard Sales/Engineering Specialist for assistance.

Water temperatureRegulatorvalve

Balanced design, high accuracy, ease of service: these are some of the reasons why companies use the Burling Valve line of steam regulators.

If temperature is going to remain the same, the Burling Valve (BS series) spring loaded regulator can be used. Set the adjustment to the desired pressure and the regulator maintains pressure automatically and very accurately.

Our expert team of sales engineers can help you with all stages of your project — valve design & selection, plumbing & building code and specification assistance.  Some of our professional installs are shown here.

Our Production Team is committed to manufacturing the finest water temperature control valves in the industry. Today we supply high/low master mixers, complete water tempering systems, emergency mixing valves, and shower valves, along with a myriad of other valve products to meet the stringent demands of today's commercial buildings.

Every building is different and all manufacturers of mixing valves pipe recirculation uniquely. We have a video to help explain the basic design of a tempered recirculation system with a Master Mixer. This video will help the plumbing professional select the proper piping method for the job.