Leighton Stone Corporation - Watts Series 40/140/240/340/342 ASME Rated, Automatic Reseating T & P Safety Relief Valves

Series 40/140/240/340/342
ASME Rated,
Automatic Reseating T & P
Safety Relief Valves
¾" to 2" N.P.T. Series
40/140/240/340/342

The combined 2 -in -1 Temperature & Pressure relief valve provides the least expensive and proven means for protection against both excessive temperature and pressure emergency conditions.

Fully automatic temperature and pressure relief protection for domestic hot water supply tanks and heaters based on the latest ANSI Z21.22 Listing Requirements for temperature discharge capacity.

40XL with test lever and extension thermostat for installation in hot water outlet within the allowable distance from the top of the tank based on latest ANSI Z21.22. Sizes: ¾" and 1" (19-25mm).

40L with test lever and short thermostat for installation directly in available tank tappings. Sizes: ¾" and 1" (19-25mm).

Series 140, N240 and 340 have the same basic body construction and advanced design features as the 40 Series and are identical to the 40 Series except for discharge capacity and size of inlet and outlet connections. For complete specifications (including specifications for the 40 Series) see other side. Sizes: 1", 1 ¼", 1 ½" and 2" (25, 32, 38 and 50mm).

SPECIFICATIONS
Temperature & Pressure Relief Valves

Each hot water storage heater shall be equipped with an automatic temperature and pressure relief valve to protect the heater from excessive pressure and excessive temperature. The device shall be certified as meeting the requirements of ASME low pressure heating boiler code and ANSI Z21.22. The BTU discharge capacity of the device shall be in excess of the BTU input rating of the heater. Watts Regulator Company Series 40, 140, 240 and 340.
PRESSURE - TEMPERATURE

Temperature relief 210°F (98.9°C).
Pressure range 75-150 psi (5.17-10.34 bars).
Standard setting 75, 100, 125 and 150 psi (5.17, 6.9, 8.61 and 10.34 bars).

STANDARDS
ASME Rated, ANSI Z21.22, Design certified and listed by CSA and meet current FHA requirements and ANSI Z21.22 in addition to Military Spec. MIL-V-136-12D, Type I.

FEATURES

Bronze body construction.
Non-mechanical seat-to-disc alignment.
Thermostat is accurate and proven. Exclusively designed and manufactured by Watts.
Tamper-resistant bonnet screws.
Series 40 and 140 feature a unique thermostat with a special thermo-bonded coating.
1" (25mm) and above sizes Model M15, M2 and M4 are standardly furnished with stainless steel thermostat tube.

WARNING

Following installation, the valve lever MUST be operated AT LEAST ONCE A YEAR by the water heater owner to ensure that the water-ways are clear. Certain naturally occurring mineral deposits may adhere to the valve, blocking waterways, rendering it inoperative. WHEN THE LEVER IS OPERATED, HOT WATER WILL DISCHARGE IF THE WATERWAYS ARE CLEAR. PRECAUTIONS MUST BE TAKEN TO AVOID PERSONAL INJURY FROM CONTACT WITH HOT WATER AND TO AVOID PROPERTY DAMAGE.

Direct Side Tapping
FOR EXTERNAL FLUE HEATERS
Use extra length extension thermostat to extend into water storage tank.

FOR INTERNAL FLUE HEATERS
Use short or standard length thermostat. Vertical discharge line must be installed with its direction downward.

For Heaters with Direct Top Tapping

Use standard or extra length extension thermostat

"Alternate" Only when the tappings are not provided

Use standard or extra length extension thermostat

For gas, electric or oil-fired storage water heaters between 180,000 to 200,000 BTU/Hr. rating: Use ¾" (19mm) Series 40, 140 tested under ANSI Z21.22 with ratings as certified and listed by CSA.

For gas or oil-fired storage water heaters between 200,000 and 730,000 BTU/Hr. rating and for compliance with applicable water heater labeling requirements: Use 1" (25mm) 40, 140, N240 Series tested under ANSI Z21.22 with ratings as certified and listed by CSA.

For installations of gas or oil-fired hot water supply boilers over 730,000 BTU/Hr. output heating domestic water and for steam coil storage water heaters: Use Series 340, 342 tested under ANSI Z21.22 with rating as certified and listed by CSA.

SPECIAL MODEL; No. 340X-8 M4Z 1 ½" (38mm) size only. Pressure setting 175 psi (5.17 bars). Temp. 210°F (98.9°C). Certified by CSA only.

DIMENSIONS - WEIGHT

Type No. Model Inlet X
Outlet
(in.) Thermostat
Length (in.)
(Below Inlet
thread) Dimensions (in.) Weight CSA Temp.
Steam Rating
BTU/hr. ** ASME Pressure Steam Rating BTU/HR

Height
(less thermostat) Width @75psi ste pres. @100psi set pres. @125psi set pres. @150psi set pres.

40L-3 M15 ¾M x ¾F 3 5 ⁵/₈ 2 ⁵/₈ 1 ¾ 180,000 777,600 997,600 1,217,600 1,437,600

40XL-5 M15 ¾M x ¾F 5 5 ⁵/₈ 2 ⁵/₈ 1 ¾ 200,000 777,600 997,600 1,217,600 1,437,600

40XL-8 M15 ¾M x ¾F 8 5 ⁵/₈ 2 ⁵/₈ 1 ¾ 200,000 777,600 997,600 1,217,600 1,437,600

140S-3 M15 ¾F x ¾F 3 5 ⁵/₈ 2 ⁵/₈ 1 ¾ 180,000 777,600 997,600 1,217,600 1,437,600

140X-5 M15 ¾F x ¾F 5 5 ⁵/₈ 2 ⁵/₈ 1 ¾ 200,000 777,600 997,600 1,217,600 1,437,600

140X-8 M15 ¾F x ¾F 8 5 ⁵/₈ 2 ⁵/₈ 1 ¾ 200,000 777,600 997,600 1,217,600 1,437,600

40L-2 M15 1M x 1F 2 6 ¼ 2 ¾ 1 ¾ 450,000 1,155,000 1,481,000 1,808,000 2,134,000

40XL-4 M15 1M x 1F 4 6 ¼ 2 ¾ 1 ¾ 500,000 1,155,000 1,481,000 1,808,000 2,134,000

40XL-7 M15 1M x 1F 7 6 ¼ 2 ¾ 1 ¾ 500,000 1,155,000 1,481,000 1,808,000 2,134,000

*140S-3 M15 1F x 1F 3 5 ½ 3 2 ¼ 570,000 1,670,000 2,140,000 2,610,000 3,085,000

*140X-6 M15 1F x 1F 6 5 ½ 3 2 ¼ 670,000 1,670,000 2,140,000 2,610,000 3,085,000

*140X-9 M15 1F x 1F 9 5 ½ 3 2 ¼ 670,000 1,670,000 2,140,000 2,610,000 3,085,000

*N240X-6 M2 1F x 1F 6 6 ⁵/₈ 3 ³/₈ 2 ¾ 730,000 2,195,000 2,817,000 3,438,000 4,059,000

*N240X-9 M2 1F x 1F 9 6 ⁵/₈ 3 ³/₈ 2 ¾ 730,000 2,195,000 2,817,000 3,438,000 4,059,000

*N241X-5 M2 1 ¼M x 1F 5 6 ⁵/₈ 3 ³/₈ 2 ¾ 730,000 2,195,000 2,817,000 3,438,000 4,059,000

*N241X-8 M2 1 ¼M x 1F 8 6 ⁵/₈ 3 ³/₈ 2 ¾ 730,000 2,195,000 2,817,000 3,438,000 4,059,000

*340-3 M2 1 ½F x 1 ½F 3 9 ¾ 4 ½ 7 1,150,000 3,450,000 4,426,000 5,403,000 6,379,000

*340X-8 M4 1 ½F x 1 ½F 8 9 ¾ 4 ½ 8 1,150,000 3,450,000 4,426,000 5,403,000 6,379,000

*342-3 M4 2M x 1 ½F 3 9 ¾ 4 ½ 7 1,150,000 3,450,000 4,426,000 5,403,000 6,379,000

*342X-8 M4 2M x 1 ½F 8 9 ¾ 4 ½ 8 1,150,000 3,450,000 4,426,000 5,403,000 6,379,000

*Standardly furnished with stainless steel thermostat tube.
**ASME capacities are steam pressure ratings and do not reflect the CSA temperature relieving capacity of the valves for selection purposes.

Temperature and Pressure Relief Valves should be inspected AT LEAST ONCE EVERY THREE YEARS, and replaced, if necessary, by a licensed plumbing contractor or qualified service technician, to ensure that the product has not been affected by corrosive water conditions and to ensure that the valve and discharge line have not been altered or tampered with illegally. Certain naturally occurring conditions may corrode the valve or its components over time, rendering the valve inoperative. Such conditions can only be detected if the valve and its components are physically removed and inspected. Do not attempt to conduct an inspection on your own. Contact your plumbing contractor for a reinspection to assure continuing safety.

Direct Side Tapping FOR EXTERNAL FLUE HEATERS Use extra length extension thermostat to extend into water storage tank. FOR INTERNAL FLUE HEATERS Use short or standard length thermostat. Vertical discharge line must be installed with its direction downward.	For Heaters with Direct Top Tapping Use standard or extra length extension thermostat	"Alternate" Only when the tappings are not provided Use standard or extra length extension thermostat
For gas, electric or oil-fired storage water heaters between 180,000 to 200,000 BTU/Hr. rating: Use ¾" (19mm) Series 40, 140 tested under ANSI Z21.22 with ratings as certified and listed by CSA. For gas or oil-fired storage water heaters between 200,000 and 730,000 BTU/Hr. rating and for compliance with applicable water heater labeling requirements: Use 1" (25mm) 40, 140, N240 Series tested under ANSI Z21.22 with ratings as certified and listed by CSA. For installations of gas or oil-fired hot water supply boilers over 730,000 BTU/Hr. output heating domestic water and for steam coil storage water heaters: Use Series 340, 342 tested under ANSI Z21.22 with rating as certified and listed by CSA. SPECIAL MODEL; No. 340X-8 M4Z 1 ½" (38mm) size only. Pressure setting 175 psi (5.17 bars). Temp. 210°F (98.9°C). Certified by CSA only.

Type No.	Model	Inlet X Outlet (in.)	Thermostat Length (in.) (Below Inlet thread)	Dimensions (in.)		Weight	CSA Temp. Steam Rating BTU/hr.	** ASME Pressure Steam Rating BTU/HR
Type No.	Model	Inlet X Outlet (in.)	Thermostat Length (in.) (Below Inlet thread)	Height (less thermostat)	Width	Weight	CSA Temp. Steam Rating BTU/hr.	@75psi ste pres.	@100psi set pres.	@125psi set pres.	@150psi set pres.
40L-3	M15	¾M x ¾F	3	5 ⁵/₈	2 ⁵/₈	1 ¾	180,000	777,600	997,600	1,217,600	1,437,600
40XL-5	M15	¾M x ¾F	5	5 ⁵/₈	2 ⁵/₈	1 ¾	200,000	777,600	997,600	1,217,600	1,437,600
40XL-8	M15	¾M x ¾F	8	5 ⁵/₈	2 ⁵/₈	1 ¾	200,000	777,600	997,600	1,217,600	1,437,600
140S-3	M15	¾F x ¾F	3	5 ⁵/₈	2 ⁵/₈	1 ¾	180,000	777,600	997,600	1,217,600	1,437,600
140X-5	M15	¾F x ¾F	5	5 ⁵/₈	2 ⁵/₈	1 ¾	200,000	777,600	997,600	1,217,600	1,437,600
140X-8	M15	¾F x ¾F	8	5 ⁵/₈	2 ⁵/₈	1 ¾	200,000	777,600	997,600	1,217,600	1,437,600
40L-2	M15	1M x 1F	2	6 ¼	2 ¾	1 ¾	450,000	1,155,000	1,481,000	1,808,000	2,134,000
40XL-4	M15	1M x 1F	4	6 ¼	2 ¾	1 ¾	500,000	1,155,000	1,481,000	1,808,000	2,134,000
40XL-7	M15	1M x 1F	7	6 ¼	2 ¾	1 ¾	500,000	1,155,000	1,481,000	1,808,000	2,134,000
*140S-3	M15	1F x 1F	3	5 ½	3	2 ¼	570,000	1,670,000	2,140,000	2,610,000	3,085,000
*140X-6	M15	1F x 1F	6	5 ½	3	2 ¼	670,000	1,670,000	2,140,000	2,610,000	3,085,000
*140X-9	M15	1F x 1F	9	5 ½	3	2 ¼	670,000	1,670,000	2,140,000	2,610,000	3,085,000
*N240X-6	M2	1F x 1F	6	6 ⁵/₈	3 ³/₈	2 ¾	730,000	2,195,000	2,817,000	3,438,000	4,059,000
*N240X-9	M2	1F x 1F	9	6 ⁵/₈	3 ³/₈	2 ¾	730,000	2,195,000	2,817,000	3,438,000	4,059,000
*N241X-5	M2	1 ¼M x 1F	5	6 ⁵/₈	3 ³/₈	2 ¾	730,000	2,195,000	2,817,000	3,438,000	4,059,000
*N241X-8	M2	1 ¼M x 1F	8	6 ⁵/₈	3 ³/₈	2 ¾	730,000	2,195,000	2,817,000	3,438,000	4,059,000
*340-3	M2	1 ½F x 1 ½F	3	9 ¾	4 ½	7	1,150,000	3,450,000	4,426,000	5,403,000	6,379,000
*340X-8	M4	1 ½F x 1 ½F	8	9 ¾	4 ½	8	1,150,000	3,450,000	4,426,000	5,403,000	6,379,000
*342-3	M4	2M x 1 ½F	3	9 ¾	4 ½	7	1,150,000	3,450,000	4,426,000	5,403,000	6,379,000
*342X-8	M4	2M x 1 ½F	8	9 ¾	4 ½	8	1,150,000	3,450,000	4,426,000	5,403,000	6,379,000
Standardly furnished with stainless steel thermostat tube. *ASME capacities are steam pressure ratings and do not reflect the CSA temperature relieving capacity of the valves for selection purposes.