Spirax-Sarco temperature control valves are self-acting valves to control the temperature in steam systems. A change in temperature at the sensor will cause the liquid filling to expand or contract. If the liquid expands it will apply a force on the thrust pin which, in turn, will cause the valve plug to move. As the liquid contracts the force on the valve plug reduces and a spring reverses its direction of travel. For heating applications the valves will be normally open and will close against a rise in temperature. For cooling applications the valves will be normally closed and will open against a rise in temperature.

Category Products

  • SKU: SG3450
  • Ships within 5 business days

Spirax-Sarco BXRA 1/2" NPT normally-closed, single seat bronze temperature control valve for cooling.

Online Price: $401.40
Regular Price: $446.00

  • SKU: SG3452
  • Ships within 5 business days

Spirax-Sarco BX2 1/2" NPT normally-open, single seat bronze temperature control valve for heating.

Online Price: $252.00
Regular Price: $280.00

  • SKU: SG3454
  • Ships within 5 business days

Spirax-Sarco BX3 1/2" NPT normally-open, single seat bronze temperature control valve for heating.

Online Price: $252.00
Regular Price: $280.00

  • SKU: SG3456
  • Ships within 5 business days

Spirax-Sarco BX4 1/2" NPT normally-open, single seat bronze temperature control valve for heating.

Online Price: $252.00
Regular Price: $280.00

  • SKU: SG3458
  • Ships within 5 business days

Spirax-Sarco BX6 1/2" NPT normally-open, single seat bronze temperature control valve for heating.

Online Price: $252.00
Regular Price: $280.00

  • SKU: SG3460
  • Ships within 5 business days

Spirax-Sarco BMRA 1/2" ANSI 300 flanged reverse-acting, normally-closed, single seat cast steel temperature control valve for cooling. This valve has a Cv of 1.92.

Online Price: $1,008.00
Regular Price: $1,163.08

  • SKU: SG3462
  • Ships within 5 business days

Spirax-Sarco BM2 1/2" ANSI 300 flanged normally-open, single seat cast steel temperature control valve for heating. This valve has a Cv of 0.44.

Online Price: $828.00
Regular Price: $920.00

  • SKU: SG3464
  • Ships within 5 business days

Spirax-Sarco BM3 1/2" ANSI 300 flanged normally-open, single seat cast steel temperature control valve for heating. This valve has a Cv of 0.74.

Online Price: $925.68
Regular Price: $1,068.10

  • SKU: SG3466
  • Ships within 5 business days

Spirax-Sarco BM4 1/2" ANSI 300 flanged normally-open, single seat cast steel temperature control valve for heating. This valve has a Cv of 1.20.

Online Price: $943.32
Regular Price: $1,088.45

  • SKU: SG3468
  • Ships within 5 business days

Spirax-Sarco BM6 1/2" ANSI 300 flanged normally-open, single seat cast steel temperature control valve for heating. This valve has a Cv of 1.92.

Online Price: $943.32
Regular Price: $1,088.45

  • SKU: SG3470
  • Ships within 7 business days

Spirax-Sarco SBRA 1/2" NPT normally-closed bronze temperature regulating valve that opens with rising temperature for cooling.

Online Price: $673.20
Regular Price: $748.00

  • SKU: SG3472
  • Ships within 7 business days

Spirax-Sarco SB 1/2" NPT normally-open bronze temperature regulating valve that closes with temperature rise for heating, single seat.

Online Price: $273.60
Regular Price: $304.00

  • SKU: SG3474
  • Ships within 7 business days

Spirax-Sarco SBRA 1/2" NPT normally-closed bronze temperature regulating valve that opens with rising temperature for cooling. Single seat with optional 1/8" (Cv .44) bleed bypass.

Online Price: $683.10
Regular Price: $759.00

  • SKU: SG3476
  • Ships within 7 business days

Spirax-Sarco SBRA 3/4" NPT normally-closed bronze temperature regulating valve that opens with rising temperature for cooling.

Online Price: $680.40
Regular Price: $756.00

  • SKU: SG3478
  • Ships within 7 business days

Spirax-Sarco SB 3/4" NPT normally-open bronze temperature regulating valve that closes with temperature rise for heating, single seat.

Online Price: $280.80
Regular Price: $312.00

  • SKU: SG3482
  • Ships within 7 business days

Spirax-Sarco SBRA 1" NPT normally-closed bronze temperature regulating valve that opens with rising temperature for cooling.

Online Price: $756.90
Regular Price: $841.00

  • SKU: SG3484
  • Ships within 7 business days

Spirax-Sarco SB 1" NPT normally-open bronze temperature regulating valve that closes with temperature rise for heating, single seat.

Online Price: $372.60
Regular Price: $414.00

  • SKU: SG3486
  • Ships within 7 business days

Spirax-Sarco SBRA 1" NPT normally-closed bronze temperature regulating valve that opens with rising temperature for cooling. Single seat with optional 1/8" (Cv .44) bleed bypass.

Online Price: $761.40
Regular Price: $846.00

  • SKU: SG3488
  • Ships within 7 business days

Spirax-Sarco NS 2-1/2" NPT normally-open, self-acting bronze temperature control valve that closes with temperature rise for heating, double seat.

Online Price: $3,486.00
Regular Price: $3,735.00

  • SKU: SG3490
  • Ships within 7 business days

Spirax-Sarco NS 2-1/2" ANSI 150 flanged normally-open, self-acting bronze temperature control valve that closes with temperature rise for heating, double seat.

Online Price: $3,956.40
Regular Price: $4,088.28

  • SKU: SG3492
  • Ships within 7 business days

Spirax-Sarco NSRA 2-1/2" NPT normally-closed, self-acting bronze temperature control valve that opens with temperature rise for cooling, double seat.

Online Price: $4,078.34
Regular Price: $4,214.28

  • SKU: SG3496
  • Ships within 10 business days

Spirax-Sarco NS 3" ANSI 150 flanged normally-open, self-acting bronze temperature control valve that closes with temperature rise for heating, double seat.

Price: $6,956.73

  • SKU: SG3542
  • Ships within 10 business days

Spirax-Sarco NS 3" NPT flanged normally-open, self-acting bronze temperature control valve that closes with temperature rise for heating, double seat.

Online Price: $4,450.65
Regular Price: $4,599.00

  • SKU: SG3498
  • Ships within 10 business days

Spirax-Sarco NSRA 3" ANSI 300 flanged normally-closed, self-acting bronze temperature control valve that opens with temperature rise for cooling, double seat.

Price: $6,013.64

  • SKU: SG3500
  • Ships within 10 business days

Spirax-Sarco NSRA 3" ANSI 150 flanged normally-closed, self-acting bronze temperature control valve that opens with temperature rise for cooling, double seat.

Price: $6,013.64

  • SKU: SG3502
  • Ships within 7 business days

Spirax-Sarco KA43 1/2" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating, single seat. This valve has a Cv of 3.36.

Online Price: $939.96
Regular Price: $1,084.57

  • SKU: SG3504
  • Ships within 7 business days

Spirax-Sarco KA43 3/4" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating, single seat. This valve has a Cv of 5.54.

Online Price: $947.52
Regular Price: $1,093.30

  • SKU: SG3506
  • Ships within 7 business days

Spirax-Sarco KA43 1" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating, single seat. This valve has a Cv of 11.4.

Online Price: $1,101.24
Regular Price: $1,270.67

  • SKU: SG3510
  • Ships within 7 business days

Spirax-Sarco KA43 1-1/4" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating, single seat. This valve has a Cv of 19.2.

Online Price: $1,362.48
Regular Price: $1,572.10

  • SKU: SG3512
  • Ships within 7 business days

Spirax-Sarco KB43 1-1/4" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating. Single seat with phosphor bronze pressure balancing bellows. This valve has a Cv of 19.2.

Online Price: $1,523.76
Regular Price: $1,758.19

  • SKU: SG3514
  • Ships within 7 business days

Spirax-Sarco KC43 1-1/4" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating. Single seat with phosphor bronze pressure balancing bellows. This valve has a Cv of 19.2.

Online Price: $3,252.48
Regular Price: $3,484.80

  • SKU: SG3516
  • Ships within 7 business days

Spirax-Sarco KB43 1-1/2" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating. Single seat with phosphor bronze pressure balancing bellows. This valve has a Cv of 27.6.

Online Price: $2,132.76
Regular Price: $2,387.42

  • SKU: SG3518
  • Ships within 7 business days

Spirax-Sarco KB43 1-1/2" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating. Single seat with stainless steel pressure balancing bellows. This valve has a Cv of 27.6.

Online Price: $2,816.52
Regular Price: $3,017.70

  • SKU: SG3520
  • Ships within 7 business days

Spirax-Sarco KA43 2" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating, single seat. This valve has a Cv of 39.6.

Online Price: $2,018.52
Regular Price: $2,259.54

  • SKU: SG3522
  • Ships within 7 business days

Spirax-Sarco KB43 2" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating. Single seat with phosphor bronze pressure balancing bellows. This valve has a Cv of 39.6.

Online Price: $1,799.28
Regular Price: $2,014.12

  • SKU: SG3526
  • Ships within 7 business days

Spirax-Sarco KX51B 1" NPT normally-closed bronze temperature control valve, with fixed bleed, that opens with temperature rise for cooling, single seat.

Online Price: $1,265.04
Regular Price: $1,459.67

  • SKU: SG3528
  • Ships within 7 business days

Spirax-Sarco KX51B 1-1/4" NPT normally-closed bronze temperature control valve, with fixed bleed, that opens with temperature rise for cooling, single seat.

Online Price: $1,539.72
Regular Price: $1,776.60

  • SKU: SG3530
  • Ships within 7 business days

Spirax-Sarco KY51 1-1/4" NPT normally-closed bronze temperature control valve, that opens with temperature rise for cooling, single seat. This valve incorporates a pressure balancing bellows, which enables the valve to operate against higher differential pressures.

Online Price: $1,325.52
Regular Price: $1,529.45

  • SKU: SG3532
  • Ships within 7 business days

Spirax-Sarco KX51B 1-1/2" NPT normally-closed bronze temperature control valve, with fixed bleed, that opens with temperature rise for cooling, single seat.

Online Price: $1,596.00
Regular Price: $1,841.54

  • SKU: SG3534
  • Ships within 7 business days

Spirax-Sarco KY51 1-1/2" NPT normally-closed bronze temperature control valve, that opens with temperature rise for cooling, single seat. This valve incorporates a pressure balancing bellows, which enables the valve to operate against higher differential pressures.

Online Price: $1,407.84
Regular Price: $1,624.44

  • SKU: SG3536
  • Ships within 7 business days

Spirax-Sarco KX51B 2" NPT normally-closed bronze temperature control valve, with fixed bleed, that opens with temperature rise for cooling, single seat.

Online Price: $1,716.96
Regular Price: $1,981.11

Category Information