Airtek Ltd. - Watts FRL

Fittings & Valves

Watts FRL

	ASME Relief Valves
	Adjustable Relief Valves
	In-Line Bronze Filters
	General Purpose Tank Drains
	Heavy Duty Tank Drains
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ASME Relief Valves

saftey valve TYPE 159

APPLICATIONS

ASME air relief valve, high capacity series. ASME coded, National Board capacity certified, designed to protect air receivers and other unfired pressure vessels. Factory set and sealed

MATERIALS

159-02 (Metal - to - Metal Seat)

Size: 1/4" NPT Male

159-03 (Metal - to - Metal Seat)

Size: 3/8" NPTMale

159-04 (Metal - to - Metal Seat)

Size: 1/2" NPT Male

Specifications

Pressure range: 25-300 psig
Temperature: 300°F MAX
Body: Brass
Disc: Stainless Steel Ball
Disc Holder: Brass
Spring: Stainless Steel
Cap: Aluminum
Pull ring: Nickel Plated Steel

RELIEF CAPACITY
STANDARD SET PRESSURE (PSIG)	RELIEF CAPACITY (SCFM)
25	30
50	50
75	69
100	89
150	128
175	148
200	168
250	207
300	246

saftey valve TYPERV78

APPLICATIONS

Lowest cost ASME relief valve for small compressor applications. Compact size and ample relief capacity fit most applications.

MATERIALS

RV78-01

Size: 1/8" NPT male

RV78-02

Size: 1/4" NPT Male

Specifications

Pressure range: ASME 35-100 psig
Temperature: 180°F MAX
Body: Brass
Disc: Silicon
Disc Holder: Brass
Spring: Music wire zinc plated
Pull ring: Nickel Plated Steel

RELIEF CAPACITY
STANDARD SET PRESSURE (PSIG)	RELIEF CAPACITY (SCFM)
35	24
50	31
75	44
100	55
125	68
150	80

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Adjustable Relief Valves

adjustable saftey valve TYPE 59A

APPLICATIONS

A low-cost relief valve for over-pressure protection of small compressors, tanks, etc. Features high relief capacity in small size. Adjustable from 25 to 200 psig in 3 spring ranges: 25 - 35 psig., 40-50 psig and 55-200 psig.

MATERIALS

59-2A

Size: 1/4" NPT Male
Temperature : 120°F MAX
Body: Brass
Disc: Silicone

STANDARD SET PRESSURE (PSIG)	RELIEF CAPACITY (SCFM)
25	20
50	35
75	40
100	60
125	65
150	85

adjustable saftey valve TYPE 130

APPLICATIONS

A small, sensitive diaphragm-type relief valve for use where gradual proportional relief is required. Locking knob and top work same as miniature regulator. Adjustable from 0 to 100 psig in 2 spring ranges.

MATERIALS

130-02-50 (0-50 psig)
130-02-100 (0-100 psig)

Size: 1/4" NPT Male
Temperature: 120°F MAX
Body: Aluminum
Diaphragm/disc:Buna-N
Adjusting knob & cage: Celcon

	STANDARD SET PRESSURE (PSIG)	RELIEF CAPACITY (SCFM)
0-50 Spring	10	1.7
	25	6.7
	50	11

0-100 Spring	50	9.9
	75	13.9
	100	19.1

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In-Line Bronze Filters

An all-bronze unit designed for applications where the fine straining of air is required. Prevents dirt and other solid matter from injuring pneumatic equipment. Porous bronze element effectively strains out particles larger than 90 microns (.0035")

PILOT NUMBER	PORT SIZE	PRESSURE RANGE
137-02	1/4"	300 psig
137-03	3/8"	300 psig
137-04	1/2"	300 psig

137

137A

STANDARD FEATURES

Bronze body
90 micron porous bronze element
"O" ring gasket: Buna-N
Performance (pressure drop at various condition)

Flow (scfm)	5	10	15	20	25
Supply pressure 100 psig	0.05	0.15	0.60	1.20	1.70
Supply pressure 150 psig	0.02	0.10	0.30	0.70	1.00

OPTIONS

Substitute Features (substitute letter in product number)

5 micron element - V
1/8" brass manual drain (increases product length by 7/16") - A

REPLACEMENT ELEMENTS

5 micron - 137AY77
90 micron - RK137Y

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General Purpose Tank Drains

Drains are designed to automatically expel condensed moisture and compressor carry-over liquids from compressed air systems, wherever liquids tend to accumulate

TYPE D11 - 04

drain