Control Products 988 User Manual

12950 W.Eight Mile Road • Oak Park,MI 48237-3288 • 248/399-8000 • FAX:[phone] • www.tr erice.com

1/1/2001

37

Pressure Regulator 988 Series

for Steam Service

The Trerice Series 988 Pressure Regulator,
designed for steam service, provides a sensitive
response to reduced pressure changes and
delivers the fullest possible volume without an
appreciable reduced pressure drop. The 988
includes a spring-loaded diaphragm that can be
externally adjusted by the operator to provide a
uniform outlet pressure. This regulator is
intended for use in testing fixtures, autoclaves,
steam tables, vulcanizers, sterilizers and other
process applications. It features a “sensitivity
adjuster,” which can be used to eliminate any
vibrating or chattering caused by critical flow
requirements.

For optimal performance,the service conditions
(medium,flow,temperature,inlet and outlet
pressures) of the application must be considered
when selecting a regulator. Please refer to the Valve
Selection Section of this catalog.Improper
application may cause failure of the valve, resulting
in possible personal injury or property damage.

Model

988

Body

Cast-iron

Diaphragm

Laminated bronze

Trim

Valve Disc: Stainless steel
Seat: Stainless steel

Strainer

Stainless steel

Maximum Inlet Pressure

200 psi

Operating T emper ature

Maximum: 387°F (197°C)

Sample Order Number: G98808B
G988 04 B

Model Connection Size Reduced Pressure Range

G988 04

1

/2NPT A 3 to 15 psi

06

3

/4NPT B 10 to 30 psi

08 1 NPT C 30 to 140 psi
10 1

1

/4NPT D 5 to 40 psi

12 1

1

/2NPT E 30 to 100 psi

16 2 NPT

How To Order

Specifications

11/2& 2 NPT Connection Size only.

Cast-Iron
Construction

Stainless Steel
Seat & Disc

1

/2

" to 2" Sizes

Sensitivity
Adjuster

988 pictured

Pressure Regulators & Acc.

12950 W.Eight Mile Road • Oak Park,MI 48237-3288 • 248/399-8000 • FAX:[phone] • www.trerice.com

6/1/2001

383838

Pressure Regulator 988 Series

for Steam Service

Valve Capacities

Steam in Pounds Per Hour (pph)

Inlet Reduced Valve Size (NPT)
Pressure (psig) Pressure (psig)1/23/4 111/4 11/2 2

10 5 27 94 133 146 208 240
20 10 40 142 200 220 312 360
30 20 48 168 237 261 370 428
40 30 54 191 270 297 420 486

20 67 237 335 368 522 603

50 40 60 210 297 327 464 535

30 76 270 381 420 595 686

60 50 65 230 324 356 505 583

40 84 298 421 463 656 758

70 60 70 246 348 382 542 626

50 92 325 458 504 714 825

80 70 74 262 370 407 577 667

60 98 348 492 541 766 885

Steam in Pounds Per Hour (pph)

Inlet Reduced Valve Size (NPT)
Pressure (psig) Pressure (psig)1/23/4 111/4 11/2 2

90 70 104 370 523 575 815 942

50 129 458 646 711 1008 1 164

100 80 110 392 554 610 864 998

60 139 493 696 766 1085 1252

120 100 122 431 608 670 948 1095

80 156 554 782 860 1219 1408

140 100 172 610 862 948 1342 1550

80 194 686 968 1065 1509 1743

160 100 211 748 1056 1162 1645 1900

90 218 772 1090 1198 1698 1961
180 100 244 862 1218 1340 1898 2192
200 100 270 955 1349 1484 2102 2428

All dimensions are nominal. Dimensions in [ ] are in millimeters.

D

B MAX.

C

A

Approximate

Size (NPT) A B C D Shipping Weight

1

/

2 4.7 [119] 7.0 [178] 1.9 [48] 6.0 [152] 11 lbs [5.0 kg]

3

/

4 4.7 [119] 7.0 [178] 1.9 [48] 6.0 [152] 11 lbs [5.0 kg]

1 5.6 [142] 7.5 [191] 2.2 [56] 7.5 [191] 20 lbs [9.1 kg]
11/4 5.6 [142] 7.5 [191] 2.2 [56] 7.5 [191] 20 lbs [9.1 kg]
11/2 6.6 [168] 11.3 [287] 2.8 [71] 9.0 [229] 40 lbs [18 kg]
2 6.6 [168] 11.3 [287] 2.8 [71] 9.0 [229] 40 lbs [18 kg]

Pressure Regulators & Acc.