Mark 87 Series External Piloted Temperature Regulators
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Jordan Valve, a Division of Richards Industries 3170 Wasson Road • Cincinnati, Ohio 45209 Telephone 513-533-5600 • Fax 513-871-0105 Toll-FreeTelephone: 800-543-7311 (U. S. A. & Canada) E-Mail: info@richardsind.com • URL: www.jordanvalve.com Mark 87 Series External Piloted Temperature Regulators The Mark 87 piloted temperature regulator is the Sliding Gate valve engineered to provide wide rangeability, and greater accuracy for a variety of temperature control applications. Designed with the same technology as the industry leading, self-contained Mark 80, the Mark 87 is a piloted temperature regulator that offers quality and performance unparalleled by any competitive products on the market. OPERATION The operation of the MK87 relies on a unique liquidvapor combination system. Due to the nature of this type of fill, the thermal operating system is capable of delivering far more operating power than the simple liquid expansion systems used on other temperature regulators. In addition, it is able to operate from the temperature of the process itself and does not require the added expense of temperature controllers or the piping of plant air. This valve is available with both direct acting and reverse acting pilot valves. The direct acting pilot valve is normally open, allowing upstream pressure to force the main diaphragm down to open the main valve seats. As the process temperature approaches the desired setting, the fluid in the bulb vaporizes, creating the necessary pressure on the pilot diaphragm to throttle the pilot valve toward the closed position. The reverse acting pilot is normally closed and opens on an increase in temperature. While identical to the Mark 80 in many ways, the piloted MK87 can provide more accurate control, and is available in large line sizes (1/2" – 6"). It can be used where larger line sizes and higher flow rates are required. The MK87 is available in a wide variety of body materials, end connections, temperature ranges, and bulb configurations. Piloted Temperature Regulators Mark 87/82 Piloted Temperature Regulators FEATURES • Sliding Gate Seats — All of Jordan Valve's pilot-operated temperature regulators feature advanced sliding gate seat technology. — Straight-through flow reduces turbulence for longer life and quieter operation — Short stroke for fast response and accurate regulation. — Easily interchangeable Cv’s — Extended tight shutoff due to wear resistant coatings and overlap of seat closure area

MK87 EXTERNALLY PILOTED TEMPERATURE REGULATOR SPECIFICATIONS — MARK 87 Sizes • 1/2" through 6" (DN15 through DN150) End Connections • Threaded • Companion Flanges (1/2" - 2") (DN15 - DN50) • Integral Flanges (2-1/2" - 6") (DN65 - DN150) Body Materials • Ductile Iron • Cast Iron • Carbon Steel • Stainless Steel Trim Materials • 303SS for DI, BZ or CS valves • 316SS for SS body valves Seat Materials • Jorcote on SST — Standard • Jorcote/Jordanic on SST — For severe service • Chrome Plated SST — Optional Diaphragm: Stainless Steel Stem Packing • Spring-loaded Teflon (500°F max/260°C) • Braided...

MK87 EXTERNALLY PILOTED TEMPERATURE REGULATOR ORDERING SCHEMATIC — MARK 87 1 — 2 — 3 / 4 5 6 7 8 9 10 11 1 Model 87 Standard 87T Temperature Gauge 2 Size Size (DN) 050 1/2" DN15 075 3/4" DN20 100 1" DN25 125 1-1/4" DN32 150 1-1/2" DN40 200 2" DN50 250 2-1/2" DN65 300 3" DN80 400 4" DN100 600 6" DN150 3 Body Material DI Ductile Iron CS Carbon Steel (WCB) S6 Stainless Steel (CF8M) 4 End Connections PT NPT BT BSPT BP BSPP SW FSW I5 150# IFE CS or SST valves I3 300# IFE CS or SST valves I7 IFE PN10 CS or SST valves I6 IFE PN16 CS or SST valves I8 IFE PN25 CS or SST valves I4 IFE PN40 CS or SST...

Mark 82 Series Internal Piloted Temperature Regulators OPERATION Reverse Acting MK82 — The internal pilot valve seats and the main valve seats are up and closed. As the process temperature rises, the fluid in the sensing bulb vaporizes to apply pressure to the pilot diaphragm, thus opening the pilot valve. The upstream pressure passes through the pilot valve, through the pilot port opening the main valve to provide the required cooling action. As the temperature sensed at the bulb drops, the pilot valve tends to close, shutting off pressure to the main valve's diaphragm. The lower spring...

MK82 INTERNALLY PILOTED TEMPERATURE REGULATOR Sizes • 1/2" through 2" (DN15 through DN50) End Connections • Threaded • Flanged Ends Body Materials • Ductile Iron • Bronze Trim Materials • Stainless Steel • Bronze Seat Materials • Jorcote on SST — Standard • Jorcote/Jordanic on SST — For severe service • Chrome Plated SST — Optional Yoke: Cast Iron Stem Packing: Spring-loaded Teflon (500°F max/260°C) Thermal System • Actuator: MK82 — Cast Iron 506; MK82FS — Cast Iron 715 • Standard Capillary: 8' Copper • Standard Armor: Brass • Standard Sensing Bulb: Copper • Note: other sizes, materials...