Type 99 Pressure Reducing Regulator Figure 1. Typical Type 99 Regulator A Type 99 regulator has Types 61L, 61LE and 61LD (low pressure); Type 61H (high pressure) or Type 61HP (extra high pressure) pilot integrally mounted to the actuator casing as shown in Figure 1. The Type 99 regulator can handle up to 1000 psig / 69.0 bar inlet pressure (the 1000 psig / 69.0 bar regulator requires a Type 1301F pilot supply regulator and a Type H110 pop relief valve). The Type 99 gas regulators provide a broad capacity for controlled pressure ranges and capacities in a wide variety of distribution, industrial and commercial applications.

Bulletin 71.2:99 Features and Benefits   •  Wide Variety of Applications—Natural gas distribution systems, gas supply to industrial boilers, furnaces, ovens, mixers, plant air service, oxygen and ammonia service and large commercial establishments such as shopping centers and schools.  •  igh Accuracy—Keeps constant inlet pressures to downstream H equipment by accurately controlling distribution system pressures at widely varying flow rates and supply pressures for maximum efficiency and best operation or by eliminating the need for pressure-compensating meters by holding a steady pressure to...

  •  High-Capacity Pressure Control— Actuator diaphragm responds quickly to downstream pressure change, causing immediate correction in main valve position. Pilot responds simultaneously and controls final positioning of main valve. This action permits full main valve travel, resulting in higher capacity than could be obtained without a pilot. W0044-1 W6531 DETAIL OF TYPE 61H PILOT SPRING CASE (REST OF PILOT IS LIKE TYPE 61L) DETAIL OF TYPE 61HP PILOT CONSTRUCTION   •  Economical, Labor-Saving Installation— Supply pressure to pilot is factory-piped directly from inlet side of main regulator body,...

Bulletin 71.2:99 Specifications Specifications and ratings for various Type 99 constructions are listed in the Specifications section below. Some specifications for a given regulator as it originally comes from the factory are stamped on the nameplates located on the pilot and actuator spring cases. An additional nameplate may be installed on the pilot to indicate a regulator with O-ring stem seal. These regulators and their installations should be checked for compliance with applicable codes. Available Construction Type 99L: Type 99 with Type 61L pilot which has 2 in. w.c. to 20 psig / 5 mbar...

Bulletin 71.2:99 Table 1. Outlet Pressure Ranges PILOT TYPE MAXIMUM PILOT SUPPLY PRESSURE psig PILOT CONTROL SPRING OUTLET PRESSURE RANGE Part Number Color Code Orange Unpainted Red Yellow Blue Brown Green Wire Diameter Free Length Green stripe 1. Type 61LD pilot only. Table 2. Approximate Proportional Bands PILOT CONTROL SPRING PILOT TYPE Wire Diameter PROPORTIONAL BAND Free Length Part Number Color Code Orange Unpainted Yellow Blue Brown Green Green stripe Table 3. Maximum Allowable Pressure Drop and Minimum Differential Pressures MAXIMUM ALLOWABLE PRESSURE DROP psig MAIN VALVE SPRING Part...

Bulletin 71.2:99 OUTLET PIPE BLEED VALVE BLEED ORIFICE MAIN VALVE SPRING MAIN DIAPHRAGM PUSHER POST ASSEMBLY PILOT DIAPHRAGM ASSEMBLY INLET PILOT DIAPHRAGM PILOT ORIFICE PILOT CONTROL SPRING INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE Figure 3. Schematic of Type 99 Regulator with Type 61L (Low Pressure) Pilot Principle of Operation The key to the operation of a Type 99 regulator is the yoked double-diaphragm pilot. Fast response and accuracy are made possible by the amplifying effect of the pressure-balanced pilot and by the two-path control system. The function of the...

Bulletin 71.2:99 DOWNSTREAM CONTROL LINE MAIN VALVE SPRING BLEED ORIFICE MAIN DIAPHRAGM BLEED VALVE RELIEF VALVE BODY YOKE CAP PUSHER POST ASSEMBLY FLANGE ADAPTOR RELAY VALVE INLET PRESSURE TUBING CONNECTION PILOT SPRING INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE Figure 4. Schematic of Type 99 Regulator with Type 61HP (Extra High Pressure) Pilot Normally, excess loading pressure slowly escapes downstream around the bleed valve (Figure 3) or through the relief valve body (Figure 4). Since loading pressure needs to exceed outlet pressure only moderately to stroke the main...

Bulletin 71.2:99 Table 4. Working Monitor Performance MONITORING PILOT INFORMATION Pilot Spring Spring Range psig Type 161AYW with 1/8 in. / 3.2 mm orifice size and 150 psig / 10.3 bar maximum allowable inlet pressure Part Number Wire Diameter Free Length MINIMUM PRESSURE AT WHICH WORKING MONITOR REGULATOR CAN BE SET 3 in. w.c. / 7 mbar over normal distribution pressure 0.5 psi / 0.03 bar over normal distribution pressure 3.0 psi / 0.21 bar over normal distribution pressure 3/4 NPT Type 627-109 with 1/8 in. / 3.2 mm orifice size and 1000 psig / 69.0 bar maximum inlet pressure / body rating for...

Bulletin 71.2:99 Type 99 lower castings accept either low or high pressure pilots without requiring separate mounting parts for each construction. When converting to an extra high pressure unit, an additional flange adapter will be required. When a Type 61L (low pressure) pilot is ordered for field conversion to a Type 61H (high pressure) pilot or vice versa, the replacement pilot assembly comes complete with a pilot cover that must be removed before installing the replacement pilot on the existing regulator. The cover can then be installed on the removed pilot to form a complete Type 61L (low...

Figure 6. Optional Travel Indicator Figure 7. Optional Type 662 Jordan Remote Control Pilot Drive 670 OR 671 SERIES TWO-GAUGE MANUAL LOADER (ALSO TYPICAL OF ONE-GAUGE LOADER THAT DISPLAYS REMOTE LOADING PRESSURE ONLY) SUPPLY PRESSURE LOADING PRESSURE Figure 8. Pneumatic Remote Adjustment Installation SENSED PRESSURE Figure 9. Type 61L (Low Pressure) Handwheel

Bulletin 71.2:99 DISTRIBUTION PRESSURE CONTROL LINE INTERMEDIATE PRESSURE CONTROL LINE TYPE 161AYW MONITORING PILOT (ALSO REPRESENTATIVE OF TYPE 627-109) WORKING MONITOR PILOT PILOT SUPPLY LINE LOADING PRESSURE INTERMEDIATE PRESSURE OPTIONAL PILOT SUPPLY REGULATOR UPSTREAM PRESSURE WORKING MONITOR REGULATOR WORKING REGULATOR OPTIONAL PILOT SUPPLY REGULATOR DISTRIBUTION PRESSURE PILOT SUPPLY PIPING FOR WORKING REGULATOR WHEN PILOT IS REQUIRED TO BE SUPPLIED FROM UPSTREAM PRESSURE Figure 10. Working Monitor Installation Monitoring Systems for Safety Monitoring regulators serve as overpressure protection...