Control Products N651-FO User Manual

20

845.778.5566 ● Fax: [phone] ●

www.nicholsonsteamtrap.com

Thermal actuator is filled at its free length with a
liquid having a lower boiling point than water.
On start-up, valve is normally open. When
steam enters trap, thermal actuator fill vaporizes
to a pressure higher than line pressure. This
forces valve into seat orifice to prevent any
further flow. As condensate collects, it takes

heat from thermal actuator, lowering internal pressure.
Line pressure will then compress thermal actuator to
open valve and discharge condensate. Valve opening
automatically adjusts to load conditions from minimum
on very light loads to full lift at maximum load. Optional
blowdown valve allows fast and easy cleaning of internal
strainer without removing trap from operation.

N650 SERIES

THERMOSTATIC

STEAM TRAPS

Pressures To 650 PSIG (44.8 barg)

Temperatures to 750°F (400°C)

Positive Shutoff — Valve and seats are lapped in

matched sets, providing tight shutoff for light and no­load conditions which results in improved energy
savings.

Freeze Proof — Self draining when installed vertically.
Compact–Easy to Install — Ample extension for pipe

wrench provided.

Easily Maintained — Actuator element and valve are

attached to cover to facilitate inspection and servicing.
Optional stainless blowdown valve permits easy strainer
cleaning while in service.

Directional Discharge — Pipe and thread erosion

prevented by directing condensate to center of discharge
pipe.

Hardened Stainless Steel Valve and Seat — Long life.

Lapped as a matched set for water tight seal.

Temperature Sensitive Actuators — One moving part.

Stainless Steel, fail open or fail closed, welded actuator
for maximum corrosion, thermal and hydraulic shock
resistance.

Positive Shutoff and Long Life — Integral Stainless

Steel Strainer helps prevent debris from depositing onto
valve and seat.

Strainer — Integral Stainless Steel Strainer standard on

all models.

Guaranteed — Guaranteed against defects in materials

or workmanship for 3 years.

MODELS*

● N651-FO–Y pattern body w/strainer and blowdown

port tapped & plugged; low capacity, fail open

● N652–Reduced capacity

● N653–Standard capacity

● N654–High capacity

*Add (-FC) for fail closed or (-FO) for fail open to end of model number

APPLICA TIONS

●

Unit Heaters

● Air Vents

● Steam Tracing

● Drip Legs

● Platen Presses

● Plating Tanks

● Sterilizers

● Tire Presses

● Cooking Equipment

● Laundry Equipment

● Other Process Equipment

OPTIONS

●

B - Blowdown Valve

● ISO - ISO Filled Actuator*

● SK - Skirted Seat*

● SLR - SLR Orifice

● SW - Socketweld

*Not available on N651

Canadian Registration # 0E0591.9

See page 9

OPERA TION

845.778.5566 ● Fax: [phone] ●

www.nicholsonsteamtrap.com

21

Connections:

1/2" or 3/4" NPT or socketweld

N650 SERIES

THERMOSTATIC

STEAM TRAPS

SPECIFICATION

Steam trap shall be of balanced pressure design with stainless
steel welded actuator capable of discharging condensate within
10°F of saturated temperature. Where greater sensitivity is
required or protection from flash steam locking, a SLR orifice will
be available to allow condensate and flash steam evacuation at
or near saturated temperatures. Where subcooling of conden­sate is desired alternate thermostatic actuator will be available to
allow condensate evacuation at or near 40°F below saturated
temperatures. Thermostatic actuator shall employ a conical valve
lapped in matched sets with the seat ring assuring tight shut off.
A minimum of four orifice sizes shall be available allowing for
custom capacity sizing. Trap shall be forged carbon steel Y
pattern body with strainer and available blow down valve suitable
for pressures to 650 psig and available in 1/2" and 3/4" NPT or
socketweld.

M

AXIMUM OPERA TING

CONDITIONS

Standard Traps
PMO: Max. Operating Pressure 500 psig (34.5 barg)
TMO: Max. Operating Temperature 600°F (316°C))

ISO Option Traps
PMO: Max. Operating Pressure 650 psig (44.8 barg)
TMO: Max. Operating Temperature 650°F (343°C)

All Traps
PMA: Max. Allowable Pressure 650 psig (44.8 barg)
TMA: Max. Allowable Temperature 750°F (400°C)

M

ATERIALS OF CONSTRUCTION

Body & Cover …………………ASTM A105 Forged Steel
Actuator……………………………Welded Stainless Steel
Cover Gasket ……304 SS Spiral Wound w/Graphite Fill
Strainer …………………….033 Perf. 304 Stainless Steel
Blowdown Valve ………………………416 Stainless Steel
Valve & Seat ………………Hardened 416 Stainless Steel

27⁄8

(73)

21⁄4

(57)

31⁄2

(89)

5 (127)

35⁄16

(84)

SHOWN WITH OPTIONAL BLOWDOWN VALVE

WEIGHT: 5 LBS. (2.3 KG)

Maximum Capacity—lbs/hr 10°F Below Saturation (Kg/hr 5°C Below Saturation)

Trap

Orifice Differential PSIG (barg)

Inch 5 10 20 50 100 125 150 200 250 300 350 400 450 500 550 600 650

(mm) (0.34) (0.7) (1.4) (3.5) (6.9) (8.62) (10.3) (13.8) (17.2) (20.7) (24.1) (27.6) (31.0) (34.5) (37.9) (41.4) (44.8)

N651

5/64 84 119 168 265 348 375 398 439 472 502 529 553 575 595 615 635 650

(2) (38) (54) (76) (120) (158) (170) (181) (199) (214) (228) (240) (251) (261) (270) (280) (289) (295)

N652

1/8 216 265 375 592 778 838 890 980 1055 1121 1180 1235 1284 1331 1377 1425 1471

(3) (98) (120) (170) (269) (354) (381) (405) (445) (480) (510) (536) (561) (584) (604) (625) (646) (667)

N653

1/4 550 825 1210 1975 2825 3140 3425 3650 3960 4100 4230 4420 4600 4760 4910 5060 5190

(6) (249) (374) (549) (896) (1281) (1424) (1554) (1656) (1796) (1860) (1919) (2005) (2086) (2161) (2232) (2297) (2359)

N654

5/16 860 1220 1725 2725 3575 3850 4090 4505 4850 5155 5425 5675 5900 6110 6310 6480 6625

(8) (390) (554) (783) (1237) (1623) (1748) (1857) (2045) (2202) (2340) (2463) (2576) (2679) (2774) (2868) (2945) (3011)

Nicholson recommends ISO filled Actuator above 500 psi (34.5 bar) and for superheated steam.
Nicholson recommends skirted seat above 300 psi (20.7 bar).